Update dependency ts-loader to v6

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
ts-loader	dependencies	major	^4.4.1 -> ^6.0.0

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Release Notes

TypeStrong/ts-loader

v6.2.1

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• Output types alongside JS files, enable declaration maps - thanks @​meyer!

v6.2.0

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• Emitting .tsbuildinfo when using watch api - thanks @​sheetalkamat!

v6.1.2

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• don't emit declaration files for a declaration file (#​1014) - thanks @​gvinaccia!
• Consume typescript apis from typescript nightly - thanks @​sheetalkamat!

v6.1.1

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• Fix SolutionBuilder watches and related fixes (#​998) - thanks @​sheetalkamat!
• fix: no errors reported if flagged with @​ts-check (#​1004) - thanks @​reinholdk!

v6.1.0

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• Build upstream project references with SolutionBuilder (#​851, #​913) - thanks @​sheetalkamat!

v6.0.4

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• Fix issue when handling files not included in tsconfig.json (#​934) - thanks @​davazp!

v6.0.3

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• Upgrade typescript version to 3.5.2 (#​954) - thanks @​fa93hws

v6.0.2

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• Set configFilePath when reading config file (#​939) - thanks @​konpikwastaken!

v6.0.1

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• Fix issue with resolveTypeReferenceDirective causing errors like Cannot find name 'it' with Jest (#​934) (#​919) - thanks @​andrewbranch!
• Fix TypeScript diagnostics not being printed to console when using project references (#​932) - thanks @​andrewbranch!

v6.0.0

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• Drop support for node < 8.6 related to micromatch upgrade to 4; see: #​929
• Update dependencies - thanks @​johnnyreilly!

v5.4.5

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• use @​types/webpack for loader typings - thanks @​LukeSheard!

v5.4.4

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• refactor: add common appendTsTsxSuffixesIfRequired function to instance - thanks @​johnnyreilly!

v5.4.3

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• feat: resolveTypeReferenceDirective support for yarn PnP - thanks @​johnnyreilly!
• fix: don't include anything apart from ts-loader in publish - thanks @​johnnyreilly!

v5.3.3

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• fix: Pass ts.Program to getCustomTransformers (#​860) - thanks @​andersekdahl!

v5.3.2

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• feat: enable experimentalFileCaching by default (#​868) - thanks @​timocov!

v5.3.1

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• fix: projectReferences with rootDir (#​868) - thanks @​andrewbranch!

v5.3.0

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• feat: Exposes a resolveNodeModule option - thanks @​arcanis!

v5.2.2

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• feat: Micro-optimizations - thanks @​johnnyreilly

v5.2.1

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• feat: Lists typescript as a peer dependency - thanks @​arcanis!

v5.2.0

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• feat: Initial support for project references - projectReferences - thanks @​andrewbranch!

v5.1.1

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• fix(getTranspilationEmit): pass the raw path to transpileModule - thanks @​Brooooooklyn

v5.1.0

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• feat: Added cache for some FS operations while compiling - experimentalFileCaching - thanks @​timocov!

v5.0.0

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• feat: Fixed issue with incorrect output path for declaration files - thanks @​JonWallsten! BREAKING CHANGE

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