Roll pub semver pkg
Roll pub semver pkg

Change-Id: I376e14f83738c8979a76cc29c316122801095f51
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/262428
Commit-Queue: Michael Thomsen <5977a55c75bb4612004451a56b0b4c22d9d3311d@google.com>
Reviewed-by: Jonas Jensen <c9327fa216ae2ef84df7c55b809d4ba270141b48@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