Discard releases when reading candidates (bazelbuild#190)

This commit fixes two related problems: when version equaled "last_rc", Bazelisk-Go would not discard release versions, and it would return the "release" suffix as part of the version label.

Fixes bazelbuild#189

Fix accidental variable shadowing that broke version resolution. (baz…

…elbuild#186)

Fixes bazelbuild#185

Fix documentation about release servers (bazelbuild#184)

In most cases Bazel binaries are fetched from GCS now, with the exception of forks (still on Github).

Fix BUILD files to correctly inject release version

Update path to binaries in bazel-out folder

Fix a bug that PATH on Windows will sometimes get overwritten (bazelb…

…uild#152)

* Fix a bug that PATH env is overwritten if it's name is `Path` (on Windows).
* Use strings.EqualFold instead of strings.ToUpper to do case-insensitive comparison.

Build go_binary targets with -s -w to reduce binary size

Bump bazel to 3.2.0 (bazelbuild#135)

release tracker, bazelbuild/bazel#11077

Add --//some/path:incompatible_some_flag as a valid incompatible flag…

… format (bazelbuild#125)

Closes bazelbuild#118

Ensure that binaries downloaded with BAZELISK_BASE_URL set are put in…

…to mirror-specific cache folders.

FYI @ali5h