python3-importlib-metadata: upgrade 3.1.0 -> 3.1.1

No upstream release notes.

Commits since 3.1.0 tag:
155bc48 (HEAD, tag: v3.1.1) Merge branch 'maint/2.x'
83c7dd2 (tag: v2.1.1, origin/maint/2.x) Merge pull request #264 from
  python/bugfix/261-versionless-egg-info-pre-normalized-fallback
4cb3bd0 Update changelog. Ref #261.
6036a37 Avoid relying on new-style normalization for legacy eggs.
4098b51 Perform exact match on Prepared.normalized, and then add a
  separate check for an empty self.normalized instead of relying on a
  degenerate result from startswith.
7bdbb57 Add test to ensure that a prefix isn't matched
595eb5f Compare the name against self.normalized. Fixes #261 but also
  will cause 'lib' to match 'lib_foo'.
fea6e75 Move is_egg into prepared.
313535a Extract method for matching a name in a prepared search.
4335def Add test capturing expectation where versionless metadata exists
  but hasn't been updated to the new normalization technique. Ref #261.
9aee90b Fix syntax in changelog
55e64a4 Merge pull request #258 from python/feature/skeleton
8721a05 Merge branch 'master' into feature/skeleton
ed672ee Consolidate coverage files
eabd24d Restore diffcov
b29baea Correct syntax for invoking pytest
d5a5c90 Bring back perf
67cb123 Run tests to exercise coverage

Signed-off-by: Tim Orling <timothy.t.orling@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>