Merge branch 'stable-3.1' into master

* stable-3.1:
  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: I2889714f802c7dc2db1a4f64f27b915bbc8962f9