Fix handling of tsconfig's

[spence-s]

• fixes "parserOptions.project" errors occur when users tsconfig does not include a file #629

• will only use default tsconfig if no other can be found.

• Now detects if tsconfig properly applies to file. If not - creates a temp tsconfig that will cover the file in question which extends any found tsconfig (this is the same as it was) and will prevent any parserOptions.project errors. (this is very similar to what happened prior to "parserOptions.project" errors occur when users tsconfig does not include a file #629 regression)

• Will not create a new file if not needed.

• tsconfig hashes are more predictable now and won't create different hashes for different node versions, which could previously cause confusion.

[sindresorhus]

Seems to fail on Node.js 16 in this TS project: https://github.com/sindresorhus/ow/runs/4091470790?check_suite_focus=true

sindresorhus/ow@db0eef8

[spence-s]

@sindresorhus - I don't think that failure is related to this PR - its a module resolution error. Nothing in this PR changed any module resolution stuff. That failure was from

xo/lib/options-manager.js

Line 478 in 4c51f23

config.baseConfig.extends.push(require.resolve('eslint-config-xo-typescript'));

- I think this is more likely related to #624

[sindresorhus]

Thanks for fixing this 🙌