chore(deps): update dependency ts-jest to v25.4.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
ts-jest (source)	devDependencies	minor	25.3.1 -> 25.4.0

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Release Notes

kulshekhar/ts-jest

v25.4.0

Compare Source

Bug Fixes

• compiler: make projectReferences work with isolatedModules: true (#​1527) (aa6b74c)
• compiler: make sure LanguageService updated with test file information before getting diagnostics for test file (#​1507) (311eaeb)
• config: set default outDir when allowJs is true and no outDir in tsconfig (#​1502) (1a287ad)
• config: use original jest config object instead of stringified config (#​1511) (4f0bb33)

25.3.1 (2020-04-03)

Bug Fixes

• only do type checking while compiling file (#​1483) (dbc0a08)
• config: set default outDir for enabled allowJs without outDir (#​1472) (57c7af0)

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[coveralls]

Coverage remained the same at 100.0% when pulling 29b4c90 on renovate/ts-jest-25.x into c7ffe11 on master.