requirements: Upgrade some libs

Upgrade some for security

Upgrade pip-tools as older version doesn't work with newest pip
jazzband/pip-tools#1558

importlib_metadata is only needed on versions less than python 3.8.
This runs on 3.8 on RTD; see readthedocs.yml
Previous versions of this file must have been compiled with older
versions of Python

requirements.txt

@@ -1,5 +1,5 @@
 #
-# This file is autogenerated by pip-compile
+# This file is autogenerated by pip-compile with python 3.8
 # To update, run:
 #
 #    pip-compile
@@ -10,7 +10,7 @@ alabaster==0.7.12
     # via sphinx
 attrs==21.2.0
     # via markdown-it-py
-babel==2.9.0
+babel==2.9.1
     # via
     #   sphinx
     #   sphinx-intl
@@ -121,10 +121,8 @@ text-unidecode==1.3
 transifex-client==0.14.2
     # via -r requirements.in
 typing-extensions==3.7.4.3
-    # via
-    #   gitpython
-    #   markdown-it-py
-urllib3==1.26.4
+    # via gitpython
+urllib3==1.26.8
     # via
     #   -r requirements.in
     #   requests

requirements_test.txt

@@ -1,5 +1,5 @@
 #
-# This file is autogenerated by pip-compile
+# This file is autogenerated by pip-compile with python 3.8
 # To update, run:
 #
 #    pip-compile requirements_test.in
@@ -14,7 +14,7 @@ attrs==20.3.0
     #   jsonschema
     #   markdown-it-py
     #   pytest
-babel==2.9.0
+babel==2.9.1
     # via
     #   sphinx
     #   sphinx-intl
@@ -45,13 +45,6 @@ idna==2.10
     # via requests
 imagesize==1.2.0
     # via sphinx
-importlib-metadata==4.0.1
-    # via
-    #   flake8
-    #   jsonschema
-    #   pep517
-    #   pluggy
-    #   pytest
 iniconfig==1.1.1
     # via pytest
 jinja2==2.11.3
@@ -102,7 +95,7 @@ packaging==20.9
     #   sphinx
 pep517==0.10.0
     # via pip-tools
-pip-tools==6.1.0
+pip-tools==6.5.1
     # via -r requirements_test.in
 pluggy==0.13.1
     # via
@@ -200,19 +193,14 @@ toml==0.10.2
 transifex-client==0.14.2
     # via -r requirements.in
 typing-extensions==3.7.4.3
-    # via
-    #   gitpython
-    #   importlib-metadata
-    #   markdown-it-py
+    # via gitpython
 urllib3==1.26.4
     # via
     #   -r requirements.in
     #   requests
     #   transifex-client
-zipp==3.4.1
-    # via
-    #   importlib-metadata
-    #   pep517
+wheel==0.37.1
+    # via pip-tools
 
 # The following packages are considered to be unsafe in a requirements file:
 # pip