Bump importlib-metadata from 1.7.0 to 2.0.0

Bumps [importlib-metadata](http://importlib-metadata.readthedocs.io/) from 1.7.0 to 2.0.0.

requirements.txt

@@ -4,7 +4,7 @@ cycler==0.10.0
 dios==0.6.0
 dtw==1.4.0
 kiwisolver==1.2.0
-importlib-metadata==1.7.0
+importlib-metadata==2.0.0
 joblib==0.16.0
 llvmlite==0.34.0
 mlxtend==0.17.3

sphinx-doc/requirements_sphinx.txt

@@ -15,7 +15,7 @@ docutils==0.16
 dtw==1.4.0
 idna==2.10
 imagesize==1.2.0
-importlib-metadata==1.5.0
+importlib-metadata==2.0.0
 Jinja2==2.11.2
 joblib==0.14.1
 kiwisolver==1.1.0