feat: Update base Python image to 3.9.5

As well as bump,

- `tox` to 3.23.1
- `virtualenv` to 20.4.6

Author: playpauseandstop

CHANGELOG.md

@@ -1,3 +1,10 @@
+# 4.3.0 (In Development)
+
+- Update `py39` image to Python 3.9.5
+- Update `py38` image to Python 3.8.10
+- Update tox to 3.23.1
+- Update virtualenv to 20.4.6
+
 # 4.2.0 (2021-05-03)
 
 - Update `py39` image to Python 3.9.4

Dockerfile

@@ -1,5 +1,5 @@
 # TODO: Find out whether it possible to use "faster" base Python image
-FROM python:3.9.4-slim-buster as python-base
+FROM python:3.9.5-slim-buster as python-base
 
 LABEL maintainer="Igor Davydenko <iam@igordavydenko.com>"
 LABEL description="Add poetry, pre-commit, and other dev-tools to official Python slim Docker image."
@@ -45,8 +45,8 @@ RUN apt install -y ${ADDITIONAL_APPS} && apt autoremove -y
 # ```
 ENV PIP_VERSION "21.1.1"
 ENV PRE_COMMIT_VERSION "2.12.1"
-ENV TOX_VERSION "3.23.0"
-ENV VIRTUALENV_VERSION "20.4.4"
+ENV TOX_VERSION "3.23.1"
+ENV VIRTUALENV_VERSION "20.4.6"
 
 RUN pip install \
     pip==${PIP_VERSION} \

README.md

@@ -35,7 +35,13 @@ FROM playpauseandstop/docker-python:4.2.0
 By default, `docker-python` image uses latest stable Python version. But some
 other versions supported as well.
 
-List of supported Python versions are (`<PY_VERSION>` -> base Docker image):
+List of supported Python versions are (`<PY_VERSION>` -> base Docker image)
+
+#### 4.3.0
+
+- `py39` -> `python:3.9.5-slim-buster`
+- `py38` -> `python:3.8.10-slim-buster`
+- `py37` & `py36` use same base image as in `4.2.0`
 
 #### 4.2.0