Merge branch 'dev' into feature-websockets-status

Pipfile

@@ -8,9 +8,6 @@ url = "https://www.piwheels.org/simple"
 verify_ssl = true
 name = "piwheels"
 
-[requires]
-python_version = "3.6"
-
 [packages]
 dateparser = "~=0.7.6"
 django = "~=3.1.3"
@@ -26,8 +23,9 @@ imap-tools = "*"
 langdetect = "*"
 pdftotext = "*"
 pathvalidate = "*"
-pillow = "*"
-pikepdf = "*"
+# pinned to 8.1.0, since aarch64 wheels might not be available beyond that https://github.com/python-pillow/Pillow/issues/5202
+pillow = "==8.1.0"
+pikepdf = "~=2.2.5"
 python-gnupg = "*"
 python-dotenv = "*"
 python-dateutil = "*"
@@ -35,12 +33,12 @@ python-Levenshtein = "*"
 python-magic = "*"
 psycopg2-binary = "*"
 redis = "*"
-scikit-learn="~=0.23.2"
+scikit-learn="~=0.24.0"
 whitenoise = "~=5.2.0"
 watchdog = "*"
 whoosh="~=2.7.4"
 inotifyrecursive = "~=0.3.4"
-ocrmypdf = "*"
+ocrmypdf = "~=11.4.5"
 tqdm = "*"
 tika = "*"
 channels = "~=3.0"
@@ -57,6 +55,6 @@ pytest-django = "*"
 pytest-env = "*"
 pytest-sugar = "*"
 pytest-xdist = "*"
-sphinx = "~=3.3"
+sphinx = "~=3.4.2"
 sphinx_rtd_theme = "*"
 tox = "*"