Merge branch 'master' into dependabot/pip/pyyaml-5.4

Author: dj-m

requirements.txt

@@ -4,7 +4,7 @@ astropy==4.0.1.post1
 attrs==19.3.0
 backcall==0.2.0
 binaryornot==0.4.4
-bleach==3.1.5
+bleach==3.3.0
 certifi==2020.6.20
 chardet==3.0.4
 click==7.1.2
@@ -22,7 +22,7 @@ ipython==7.16.1
 ipython-genutils==0.2.0
 ipywidgets==7.5.1
 jedi==0.17.1
-Jinja2==2.11.2
+Jinja2==2.11.3
 jinja2-time==0.2.0
 joblib==0.16.0
 jsonschema==3.2.0
@@ -50,7 +50,7 @@ parso==0.7.0
 pexpect==4.8.0
 phik==0.10.0
 pickleshare==0.7.5
-Pillow==7.2.0
+Pillow==8.1.1
 poyo==0.5.0
 prometheus-client==0.8.0
 prompt-toolkit==3.0.5