Merge branch 'stable-3.0' into stable-3.1

* stable-3.0:
  Bump Bazel version to 3.7.0
  Upgrade javamelody-core to 1.86.0
  Upgrade bazlets to latest stable-3.0 to build with 3.0.13 API

Change-Id: I3ac9c776a93db5effa9c99115507fb392a0a20e0