Support WORKSPACE.bazel file (#100)
Support WORKSPACE.bazel file (#100)

When finding workspace root, also check the existence of WORKSPACE.bazel
file. Bazel supports WOKRSPACE.bazel file from 1.2.

Related https://github.com/bazelbuild/bazel/pull/10175
bazelbuild/bazelisk,bazelbuild/bazelisk,bazelbuild/bazelisk,bazelbuild/bazelisk