Update package_config
Update package_config


Bump pub

```
> git log --format="%C(auto) %h %s" 70b1a4f9229a36bac6340ec7eae2b2068baac96c..9f2ddc02f066c68fb638ff65fbb73761ece23267
 9f2ddc02 Use uris for paths in git source descriptions (#3063)
 97a0033e Update README.md (#3069)
 2ef10adf Roll setup-dart (#3054)
 4b5450d3 Updated repository specification. (#3050)
 0f3055db Add executables to allErrors (#3048)
```

Change-Id: Iaa42df2339b6f62aeb63e0f2e7eaf062da84e7c6
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/209681
Reviewed-by: Jonas Jensen <c9327fa216ae2ef84df7c55b809d4ba270141b48@google.com>
Commit-Queue: Sigurd Meldgaard <3f12f2c0f1efe4fd67753fcd55cd7bc21e5b85cf@google.com>

dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk