fix: make sure lib.d.ts file name is detectable.
fix: make sure lib.d.ts file name is detectable.

Do not use its absolute path, but rather just its
(hopefully) unique name.
caitp/ts2dart,vicb/ts2dart,jeffbcross/ts2dart,hterkelsen/ts2dart,alfonso-presa/ts2dart,yjbanov/ts2dart,jteplitz602/ts2dart,hansl/ts2dart,dart-archive/ts2dart,jteplitz602/ts2dart,hterkelsen/ts2dart,jeffbcross/ts2dart,jacob314/ts2dart,hansl/ts2dart,alfonso-presa/ts2dart,caitp/ts2dart,dart-archive/ts2dart,jacob314/ts2dart,vicb/ts2dart,yjbanov/ts2dart,dart-archive/ts2dart