Update dependencies

Dockerfile

@@ -1,4 +1,4 @@
-FROM python:3.8.3-slim-buster
+FROM python:3.9-slim-buster
 
 WORKDIR /app/
 

requirements.txt

@@ -1,23 +1,44 @@
 #
-# This file is autogenerated by pip-compile
+# This file is autogenerated by pip-compile with python 3.9
 # To update, run:
 #
 #    pip-compile
 #
-certifi==2020.4.5.1       # via requests
-chardet==3.0.4            # via requests
-click==7.1.1              # via -r requirements.in
-grpcio-tools==1.28.1      # via -r requirements.in
-grpcio==1.28.1            # via -r requirements.in, grpcio-tools
-idna==2.9                 # via requests
-munch==2.5.0              # via -r requirements.in
-prometheus-client==0.7.1  # via -r requirements.in
-protobuf==3.11.3          # via grpcio-tools
-pykube-ng==20.4.1         # via -r requirements.in
-pyyaml==5.3.1             # via -r requirements.in, pykube-ng
-requests==2.23.0          # via pykube-ng
-six==1.14.0               # via grpcio, munch, protobuf
-urllib3==1.25.9           # via requests
+certifi==2021.5.30
+    # via requests
+chardet==4.0.0
+    # via requests
+click==8.0.1
+    # via -r requirements.in
+grpcio==1.38.1
+    # via
+    #   -r requirements.in
+    #   grpcio-tools
+grpcio-tools==1.38.1
+    # via -r requirements.in
+idna==2.10
+    # via requests
+munch==2.5.0
+    # via -r requirements.in
+prometheus-client==0.11.0
+    # via -r requirements.in
+protobuf==3.17.3
+    # via grpcio-tools
+pykube-ng==21.3.0
+    # via -r requirements.in
+pyyaml==5.4.1
+    # via
+    #   -r requirements.in
+    #   pykube-ng
+requests==2.25.1
+    # via pykube-ng
+six==1.16.0
+    # via
+    #   grpcio
+    #   munch
+    #   protobuf
+urllib3==1.26.6
+    # via requests
 
 # The following packages are considered to be unsafe in a requirements file:
 # setuptools