Update Python dependencies

Author: mdmintz

requirements.txt

@@ -52,6 +52,8 @@ ipython==5.10.0;python_version<"3.5"
 ipython==6.5.0;python_version>="3.5" and python_version<"3.6"
 ipython==7.16.1;python_version>="3.6" and python_version<"3.7"
 ipython==7.18.1;python_version>="3.7"
+importlib-metadata==1.7.0
+virtualenv>=20.0.31
 colorama==0.4.3
 pymysql==0.10.1
 coverage==5.3
@@ -61,7 +63,6 @@ boto==2.49.0
 cffi==1.14.3
 zipp==1.2.0;python_version<"3.6"
 zipp==3.2.0;python_version>="3.6"
-importlib-metadata==2.0.0
 rich==7.1.0;python_version>="3.6" and python_version<"4.0"
 flake8==3.7.9;python_version<"3.5"
 flake8==3.8.3;python_version>="3.5"

setup.py

@@ -146,6 +146,8 @@
         'ipython==6.5.0;python_version>="3.5" and python_version<"3.6"',
         'ipython==7.16.1;python_version>="3.6" and python_version<"3.7"',
         'ipython==7.18.1;python_version>="3.7"',
+        'importlib-metadata==1.7.0',  # Must stay in sync with "virtualenv"
+        'virtualenv>=20.0.31',  # Must stay in sync with "importlib-metadata"
         'colorama==0.4.3',
         'pymysql==0.10.1',
         'coverage==5.3',
@@ -155,7 +157,6 @@
         'cffi==1.14.3',
         'zipp==1.2.0;python_version<"3.6"',
         'zipp==3.2.0;python_version>="3.6"',
-        'importlib-metadata==2.0.0',
         'rich==7.1.0;python_version>="3.6" and python_version<"4.0"',
         'flake8==3.7.9;python_version<"3.5"',
         'flake8==3.8.3;python_version>="3.5"',