* **compiler:** don't resolve files from build folder for `projectReferences` ([#1614](https://github.com/kulshekhar/ts-jest/issues/1614)) ([74b92d3](https://github.com/kulshekhar/ts-jest/commit/74b92d3))
* **config:** don't set `include` value of `tsconfig` to empty array ([#1606](https://github.com/kulshekhar/ts-jest/issues/1606)) ([8a29aaa](https://github.com/kulshekhar/ts-jest/commit/8a29aaa))
* **compiler:** make `projectReferences` work with `isolatedModules: false` ([#1541](https://github.com/kulshekhar/ts-jest/issues/1541)) ([3e8efbe](https://github.com/kulshekhar/ts-jest/commit/3e8efbe))
* **compiler:** allow using `files` provided by `tsconfig` ([#1562](https://github.com/kulshekhar/ts-jest/issues/1562)) ([a9f02bd](https://github.com/kulshekhar/ts-jest/commit/a9f02bd))
* **config:** verify `testMatchPatterns` contain RegExp instance or string type values ([#1569](https://github.com/kulshekhar/ts-jest/issues/1569)) ([7f85bab](https://github.com/kulshekhar/ts-jest/commit/7f85bab))
### Features
* **config:** add `tsconfig` alias to `tsConfig` option ([#1565](https://github.com/kulshekhar/ts-jest/issues/1565)) ([c10eb6d](https://github.com/kulshekhar/ts-jest/commit/c10eb6d))
* **config:** define 'ts-jest' on `ConfigGlobals` interface of `@jest/types` ([#1592](https://github.com/kulshekhar/ts-jest/issues/1592)) ([4526392](https://github.com/kulshekhar/ts-jest/commit/4526392))
### Performance Improvements
* **compiler:** don’t write compile output to file system but rely on jest cache ([#1561](https://github.com/kulshekhar/ts-jest/issues/1561)) ([d11a4ea](https://github.com/kulshekhar/ts-jest/commit/d11a4ea))
* **compiler:** improve performance for `isolatedModules: false` ([#1558](https://github.com/kulshekhar/ts-jest/issues/1558)) ([85c09e3](https://github.com/kulshekhar/ts-jest/commit/85c09e3))
### BREAKING CHANGES
* Any custom typing files or files which are needed to be compiled and intended to use with `jest` need to be defined in `files` option of `tsconfig`.
For example:
```
// tsconfig.json
{
// ...other configs
"files": [
"my-custom-typings.d.ts",
"my-global-module.ts"
]
}
```
* **compiler:** `incremental` and `compilerHost` options are no longer available. Please remove it from your `ts-jest` config.
* **compiler:** allow using `files` provided by `tsconfig` ([#1562](https://github.com/kulshekhar/ts-jest/issues/1562)) ([907a280](https://github.com/kulshekhar/ts-jest/commit/907a280))
* **config:** verify `testMatchPatterns` contain `RegExp` instance or `string` type values ([#1569](https://github.com/kulshekhar/ts-jest/issues/1569)) ([7f85bab](https://github.com/kulshekhar/ts-jest/commit/7f85bab))
### Features
* **config:** add `tsconfig` alias to `tsConfig` option ([#1565](https://github.com/kulshekhar/ts-jest/issues/1565)) ([c10eb6d](https://github.com/kulshekhar/ts-jest/commit/c10eb6d))
### Performance Improvements
* **compiler:** don’t write compile output to file system but rely on `jest` cache ([#1561](https://github.com/kulshekhar/ts-jest/issues/1561)) ([07b5f62](https://github.com/kulshekhar/ts-jest/commit/07b5f62))
### BREAKING CHANGES
* Any custom typing files or files which are needed to be compiled and intended to use with `jest` need to be defined in `files` option of `tsconfig`.
* **compiler:** make `projectReferences` work with `isolatedModules: false` ([#1541](https://github.com/kulshekhar/ts-jest/issues/1541)) ([3e8efbe](https://github.com/kulshekhar/ts-jest/commit/3e8efbe))
### Performance
* **compiler:** improve performance for `isolatedModules: false` ([#1558](https://github.com/kulshekhar/ts-jest/issues/1558)) ([85c09e3](https://github.com/kulshekhar/ts-jest/commit/85c09e3))
### BREAKING CHANGES
* **config:** `compilerHost` and `incremental` options are no longer available
* **compiler:** make `projectReferences` work with `isolatedModules: true` ([#1527](https://github.com/kulshekhar/ts-jest/issues/1527)) ([aa6b74c](https://github.com/kulshekhar/ts-jest/commit/aa6b74c))
* **compiler:** make sure `LanguageService` updated with test file information before getting diagnostics for test file ([#1507](https://github.com/kulshekhar/ts-jest/issues/1507)) ([311eaeb](https://github.com/kulshekhar/ts-jest/commit/311eaeb))
* **config:** set default `outDir` when `allowJs` is true and no `outDir` in `tsconfig` ([#1502](https://github.com/kulshekhar/ts-jest/issues/1502)) ([1a287ad](https://github.com/kulshekhar/ts-jest/commit/1a287ad))
* **config:** use original jest config object instead of stringified config ([#1511](https://github.com/kulshekhar/ts-jest/issues/1511)) ([4f0bb33](https://github.com/kulshekhar/ts-jest/commit/4f0bb33))
* only do type checking while compiling file ([#1483](https://github.com/kulshekhar/ts-jest/issues/1483)) ([dbc0a08](https://github.com/kulshekhar/ts-jest/commit/dbc0a08))
* **config:** set default outDir for enabled allowJs without outDir ([#1472](https://github.com/kulshekhar/ts-jest/issues/1472)) ([57c7af0](https://github.com/kulshekhar/ts-jest/commit/57c7af0))
* add `jest-config` to dependencies list ([6d9e0d8](https://github.com/kulshekhar/ts-jest/commit/6d9e0d8))
* always do type check for all files provided to ts-jest transformer for non-watch mode ([#1450](https://github.com/kulshekhar/ts-jest/issues/1450)) ([107e062](https://github.com/kulshekhar/ts-jest/commit/107e062))
* **config:** improve diagnostics message ([#1444](https://github.com/kulshekhar/ts-jest/issues/1444)) ([96cd9b3](https://github.com/kulshekhar/ts-jest/commit/96cd9b3)). This will affect to any snapshots or assertion against diagnostics messages
* **compiler:** allow transformation of typescript files in node_modules ([#1385](https://github.com/kulshekhar/ts-jest/issues/1385)) ([814405e](https://github.com/kulshekhar/ts-jest/commit/814405e))
* **docs:** fixing slack link and some minor typos in documenation ([#1404](https://github.com/kulshekhar/ts-jest/issues/1404)) ([3e2e008](https://github.com/kulshekhar/ts-jest/commit/3e2e008))
* **transformer:** add deepUnmock to hoist method list ([#1372](https://github.com/kulshekhar/ts-jest/issues/1372)) ([0fbbc00](https://github.com/kulshekhar/ts-jest/commit/0fbbc00))
* **util:** use resolve package typescript package in yarn workspaces ([#1377](https://github.com/kulshekhar/ts-jest/issues/1377)) ([a63808c](https://github.com/kulshekhar/ts-jest/commit/a63808c))
* jest 25 type definitions ([#1363](https://github.com/kulshekhar/ts-jest/issues/1363)) ([ba82a9e](https://github.com/kulshekhar/ts-jest/commit/ba82a9e))
* **compiler:** do not force module kind if piping babel ([acebc8c](https://github.com/kulshekhar/ts-jest/commit/acebc8c)), closes [#767](https://github.com/kulshekhar/ts-jest/issues/767)
### Features
* **helpers:** adds a mocked test helper for mock typings ([f976135](https://github.com/kulshekhar/ts-jest/commit/f976135)), closes [#576](https://github.com/kulshekhar/ts-jest/issues/576)
* **cli:** resets testMatch if using testRegex option ([31ad0aa](https://github.com/kulshekhar/ts-jest/commit/31ad0aa)), closes [#756](https://github.com/kulshekhar/ts-jest/issues/756)
* **diagnostics:** throws only for category warning and error ([bb28849](https://github.com/kulshekhar/ts-jest/commit/bb28849)), closes [#748](https://github.com/kulshekhar/ts-jest/issues/748)
* **import:** wrong error message when a module exists but fails ([e0d6c57](https://github.com/kulshekhar/ts-jest/commit/e0d6c57))
* **preset:** createJestPreset fails with base and no array ([3c325e8](https://github.com/kulshekhar/ts-jest/commit/3c325e8))
### Features
* **cli:** CLI 'config:migrate' now detects best preset ([febd8d3](https://github.com/kulshekhar/ts-jest/commit/febd8d3))
* **preset:** adds 2 presets along the default one ([9f3d759](https://github.com/kulshekhar/ts-jest/commit/9f3d759))
* **preset:** adds presets typings and export all presets ([f55d895](https://github.com/kulshekhar/ts-jest/commit/f55d895))
* **babel:** instrumentation was done twice when using babel ([659a7fb](https://github.com/kulshekhar/ts-jest/commit/659a7fb)), closes [#713](https://github.com/kulshekhar/ts-jest/issues/713)
* **cache:** includes all parameters in cache key computing ([70e1867](https://github.com/kulshekhar/ts-jest/commit/70e1867))
* **e2e:** fixes the eval tool (not used yet) ([939d13a](https://github.com/kulshekhar/ts-jest/commit/939d13a))
* we are not writing files, use normalized EOL ([47fff43](https://github.com/kulshekhar/ts-jest/commit/47fff43))
* **tests:** CI fixes ([34a41ea](https://github.com/kulshekhar/ts-jest/commit/34a41ea))
* **tests:** detect npm version to use or not ci ([683a1e5](https://github.com/kulshekhar/ts-jest/commit/683a1e5))
* **tests:** do not use babel in our tests + new API for simple ([3e4de3e](https://github.com/kulshekhar/ts-jest/commit/3e4de3e))
* **tests:** more sanitizing for windows compat ([faae274](https://github.com/kulshekhar/ts-jest/commit/faae274))
### Features
* **config:** adds a helper to build moduleNameMapper from paths ([7b8598e](https://github.com/kulshekhar/ts-jest/commit/7b8598e)), closes [#364](https://github.com/kulshekhar/ts-jest/issues/364)
* **package:** update source-map-support to version 0.5.0 ([f0aab12](https://github.com/kulshekhar/ts-jest/commit/f0aab12))
* **package:** update yargs to version 10.0.3 ([5cdf969](https://github.com/kulshekhar/ts-jest/commit/5cdf969))
* **package:** update yargs to version 11.0.0 ([7e9ce40](https://github.com/kulshekhar/ts-jest/commit/7e9ce40))
* add startDir to if-clause ([eed5311](https://github.com/kulshekhar/ts-jest/commit/eed5311))
* **package:** update yargs to version 9.0.1 ([#326](https://github.com/kulshekhar/ts-jest/issues/326)) ([8bf9924](https://github.com/kulshekhar/ts-jest/commit/8bf9924))
### Features
* add option to run TypeScript diagnostics ([13b77d9](https://github.com/kulshekhar/ts-jest/commit/13b77d9))