Bump importlib-metadata from 1.6.1 to 1.7.0

Bumps [importlib-metadata](http://importlib-metadata.readthedocs.io/) from 1.6.1 to 1.7.0.

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

requirements.txt

@@ -1,5 +1,5 @@
 attrs==19.3.0
-importlib-metadata==1.6.1
+importlib-metadata==1.7.0
 more-itertools==8.4.0
 packaging==20.4
 parso==0.7.0