fix: show problematic file path when encountering malformed JSON5

[fwouts]

In a large codebase with lots of tsconfig.json extending each other, when JSON5 parsing crashes, it can be unclear which tsconfig file was problematic. This should help point out the issue more easily.

Note: all formatting changes were caused by the pre-commit hook. I'd be happy to force-revert them if desired.

[jonaskello]

@fwouts Could you merge with master and push? After that I think we should be good to merge this.

[fwouts]

Done! Better late than never 🥳

[codecov]

Codecov Report

Merging #176 (f183055) into master (9a3c0ed) will increase coverage by 0.21%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #176      +/-   ##
==========================================
+ Coverage   67.76%   67.97%   +0.21%     
==========================================
  Files           9        9              
  Lines         304      306       +2     
  Branches       93       93              
==========================================
+ Hits          206      208       +2     
  Misses         92       92              
  Partials        6        6              

Impacted Files	Coverage Δ
src/tsconfig-loader.ts	84.37% <100.00%> (+0.50%)	⬆️

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[jonaskello]

Thanks!