Build(deps): Generally update JS & Python deps (#512)

Pipfile

@@ -11,7 +11,6 @@ asgiref = "~=3.3.1"
 beautifulsoup4 = "~=4.9.3"
 Brotli = "~=1.0.9"
 cachetools = "~=4.2.1"
-certifi = "~=2020.12.5"
 chardet = "~=4.0.0"
 configparser = "~=5.0.1"
 contextlib2 = "~=0.6.0.post1"
@@ -26,14 +25,12 @@ django-ical = "~=1.7.1"
 django-recurrence = "~=1.10.3"
 django-registration-redux = "~=2.9"
 django-reversion = "~=3.0.9"
-django-toolbelt = "~=0.0.1"
 django-widget-tweaks = "~=1.4.8"
 django-htmlmin = "~=0.11.0"
 envparse = "~=0.2.0"
 gunicorn = "~=20.0.4"
 icalendar = "~=4.0.7"
 idna = "~=2.10"
-lxml = "~=4.7.1"
 Markdown = "~=3.3.3"
 msgpack = "~=1.0.2"
 pep517 = "~=0.9.1"
@@ -45,7 +42,7 @@ psycopg2 = "~=2.8.6"
 Pygments = "~=2.7.4"
 pyparsing = "~=2.4.7"
 PyPDF2 = "~=1.27.5"
-PyPOM = "~=2.2.0"
+PyPOM = "~=2.2.4"
 python-dateutil = "~=2.8.1"
 pytoml = "~=0.1.21"
 pytz = "~=2020.5"
@@ -82,10 +79,10 @@ django-hcaptcha = "*"
 pikepdf = "*"
 django-queryable-properties = "*"
 django-mass-edit = "*"
+selenium = "~=3.141.0"
 
 [dev-packages]
-selenium = "~=3.141.0"
-pycodestyle = "*"
+pycodestyle = "~=2.9.1"
 coveralls = "*"
 django-coverage-plugin = "*"
 pytest-cov = "*"