Update dependency bazel_skylib to v0.9.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
bazel_skylib	http_archive	minor	0.6.0 -> 0.9.0

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Release Notes

bazelbuild/bazel-skylib (bazel_skylib)

v0.9.0

Compare Source

New Features

• common_settings.bzl: Standard data types for user defined build
  configuration. Common scalar build settings for rules to use so they don't
  recreate them locally. This fulfills part of the SBC design doc:
  https://docs.google.com/document/d/1vc8v-kXjvgZOdQdnxPTaV0rrLxtP2XwnD2tAZlYJOqw/edit#bookmark=id.iiumwic0jphr

• selects.bzl: Add config_setting_group for config_setting AND/OR-chaining
  Implements
  https://github.com/bazelbuild/proposals/blob/HEAD/designs/2018-11-09-config-setting-chaining.md.

• Make sets.bzl point to new_sets.bzl instead of old_sets.bzl. new_sets.bzl
  and old_sets.bzl should be removed in the following skylib release.

• run_binary: runs an executable as an action

  • This rule is an alternative for genrule(): it can run a binary with the
    desired arguments, environment, inputs, and outputs, as a single build
    action, without shelling out to Bash.
  • Fixes https://github.com/bazelbuild/bazel-skylib/issues/149

• New native_binary() and native_test() rules let you wrap a pre-built
  binary in a binary and test rule respectively.

  • native_binary() wraps a pre-built binary or script in a *_binary rule
    interface. Rules like genrule can tool-depend on it, and it can be
    executed with "bazel run". This rule can also augment the binary with
    runfiles.
  • native_test() is similar, but creates a testable rule instead of a
    binary rule.
  • Fixes https://github.com/bazelbuild/bazel-skylib/issues/148

• diff_test: test rule compares two files and passes if the files match.

  On Linux/macOS/non-Windows, the test compares files using 'diff'.

  On Windows, the test compares files using 'fc.exe'. This utility is
  available on all Windows versions I tried (Windows 2008 Server, Windows 2016
  Datacenter Core).

  See https://github.com/bazelbuild/bazel/issues/5508,
  https://github.com/bazelbuild/bazel/issues/43194319

• maprule: move functionality to maprule_util.bzl. maprule_util.bzl will
  benefit planned new rules (namely a genrule alternative).

This release is tested with Bazel 0.28

v0.8.0

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New Features

• “Analysis Test” testing framework under unittest.bzl. See documentation for details. Some new feature highlights:
  • Support for verifying rule-under-test failure conditions
  • Support for verifying actions registered by a rule-under-test
  • Support for verifying rule behavior under non-default bazel flags
• analysis_test rule to verify that targets under test pass Bazel’s analysis phase. This is similar to the existing build_test rule, except that actions of the underlying targets are not executed. See documentation.
• write_file rule to write UTF-8 encoded text files. (Works for bash platforms and Windows)
• copy_file rule to copy a file to another location. (Works for bash platforms and Windows)
• dicts.add() now accepts kwargs to add to the resulting dict.

This release is tested with Bazel 0.23

Thanks to the following external contributors:

• Dave Lee (@​kastiglione): e9588ee

Please use the bazel-skylib.0.8.0.tar.gz release asset from your Bazel WORKSPACE.

SHA-256 digest: 2ef429f5d7ce7111263289644d233707dba35e39696377ebab8b0bc701f7818e

[Complete list of changes](

v0.7.0

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Incompatible Changes

• Made an incompatible change to unittest.bzl requiring minor migration effort:
  Test implementation functions for this framework now must return the result of unittest.end(env) instead of simply invoking this method. That is:
  def _your_test(ctx):
  env = unittest.begin(ctx)

Assert statements go here

    unittest.end(env)
```
must become:
```
def _your_test(ctx):
    env = unittest.begin(ctx)

Assert statements go here

    return unittest.end(env)
```

New Features

• Added Windows support for unittest.bzl.

• Added maprule rules (cmd_maprule and bash_maprule under //rules/maprule.bzl for Windows and bash support, respectively)

• Added a build_test rule (build_test under //rules/build_test.bzl) to create test targets that verify that other targets build. Note that this rule does not currently work on Windows (though support for Windows shall come at a later time).

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