Use a forked version of node-source-map-support.
Use a forked version of node-source-map-support.

The main repository hasn't integrated our bug fix yet, giving bad stack traces
for files that contain more than one sourceMappingURL comment.

dart-archive/ts2dart,vsavkin/ts2dart,alfonso-presa/ts2dart,hansl/ts2dart,hterkelsen/ts2dart,caitp/ts2dart,yjbanov/ts2dart,hansl/ts2dart,yjbanov/ts2dart,jeffbcross/ts2dart,vicb/ts2dart,dart-archive/ts2dart,vsavkin/ts2dart,jacob314/ts2dart,jacob314/ts2dart,jteplitz602/ts2dart,vicb/ts2dart,hterkelsen/ts2dart,caitp/ts2dart,jteplitz602/ts2dart,alfonso-presa/ts2dart,jeffbcross/ts2dart,dart-archive/ts2dart