Update dependency ts-jest to v26.2.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
ts-jest (source)	devDependencies	minor	26.1.4 -> 26.2.0

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Release Notes

kulshekhar/ts-jest

v26.2.0

Compare Source

Bug Fixes

• move @types/jest to dependencies to work well with yarn 2 (#​1859) (5eb1389), closes #​1857

Features

• config: support after and afterDeclarations AST transformers (#​1831) (be20a7c)
• allow opt-out version warning message by environment variable TS_JEST_DISABLE_VER_CHECKER (#​1821) (e6b42fc), closes #​1774

26.1.4 (2020-07-28)

Bug Fixes

• compiler: check if test file exists before doing type check (#​1827) (cc89d5b), closes #​1506

26.1.3 (2020-07-16)

Bug Fixes

• revert #​1793 (#​1804) (5095525)

26.1.2 (2020-07-13)

Bug Fixes

• compiler: use resolveModuleNames TypeScript API to get resolved modules for test files (#​1784) (5f26054), closes #​1747
• config: invalidate cache when other options in tsconfig change (#​1788) (6948855)

Performance Improvements

• compiler: cache module resolution for isolatedModules: false (#​1786) (7f731ed)
• compiler: use globsToMatcher from jest-util (#​1754) (44f3913)

26.1.1 (2020-06-21)

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

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