Update dependency ts-jest to v26

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
ts-jest (source)	devDependencies	major	25.4.0 -> 26.1.1

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Release Notes

kulshekhar/ts-jest

v26.1.1

Compare Source

Bug Fixes

• compiler: generate source map correctly when tsconfig mapRoot is set (#​1741) (01ac417), closes #​1718
• config: show version warning when using ts-jest without babel (#​1729) (e512bc0), fixes #​1678-issuecomment-641930332, #​1678-issuecomment-639528993

v26.1.0

Compare Source

Bug Fixes

• typing: don't mark BabelConfig as internal type (#​1667) (558c307), closes #​1666

Features

• config: show a warning message when TypeScript target version doesn't match with recommended NodeJs version (#​1678) (085bdf5)
• config: support multiple paths for pathsToModuleNameMapper (#​1690) (a727bd5)
• support TypeScript 3.9 (#​1653) (fc3d5ad)

v26.0.0

Compare Source

Bug Fixes

• compiler: return undefined for getScriptVersion when a file doesn't exist in memory cache (#​1641) (6851b8e)

Features

• support Jest v26 (#​1602) (23b7741)

BREAKING CHANGES

• Requires a minimum of TypeScript v3.8
• Drop support for Node 8

25.5.1 (2020-05-09)

Bug Fixes

• compiler: don't resolve files from build folder for projectReferences (#​1614) (74b92d3)
• config: don't set include value of tsconfig to empty array (#​1606) (8a29aaa)

v25.5.1

Compare Source

Bug Fixes

• compiler: don't resolve files from build folder for projectReferences (#​1614) (74b92d3)
• config: don't set include value of tsconfig to empty array (#​1606) (8a29aaa)

v25.5.0

Compare Source

Bug Fixes

• compiler: make projectReferences work with isolatedModules: false (#​1541) (3e8efbe)
• compiler: allow using files provided by tsconfig (#​1562) (a9f02bd)
• config: verify testMatchPatterns contain RegExp instance or string type values (#​1569) (7f85bab)

Features

• config: add tsconfig alias to tsConfig option (#​1565) (c10eb6d)
• config: define 'ts-jest' on ConfigGlobals interface of @jest/types (#​1592) (4526392)

Performance Improvements

• compiler: don’t write compile output to file system but rely on jest cache (#​1561) (d11a4ea)
• compiler: improve performance for isolatedModules: false (#​1558) (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.

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