Stop testing Python 3.6 on CI

.github/workflows/test.yml

@@ -15,9 +15,6 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v2
-      - uses: actions/setup-python@v2
-        with:
-          python-version: "3.6"
       - uses: actions/setup-python@v2
         with:
           python-version: "3.7"
@@ -218,7 +215,7 @@ jobs:
           # CPython
           - target: aarch64-unknown-linux-gnu
             arch: aarch64
-            abi: cp36-cp36m
+            abi: cp37-cp37m
           - target: armv7-unknown-linux-gnueabihf
             arch: armv7
             abi: cp39-cp39

Dockerfile

@@ -5,7 +5,7 @@ ENV PATH /root/.cargo/bin:$PATH
 # Use an explicit version to actually install the version we require instead of using the cache
 # It would be even cooler to invalidate the cache depending on when the official rust image changes,
 # but I don't know how to do that
-RUN curl --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- --default-toolchain 1.57.0 -y
+RUN curl --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- --default-toolchain 1.59.0 -y
 
 # Compile dependencies only for build caching
 ADD Cargo.toml /maturin/Cargo.toml
@@ -28,7 +28,7 @@ FROM quay.io/pypa/manylinux2010_x86_64
 
 ENV PATH /root/.cargo/bin:$PATH
 # Add all supported python versions
-ENV PATH /opt/python/cp36-cp36m/bin/:/opt/python/cp37-cp37m/bin/:/opt/python/cp38-cp38/bin/:/opt/python/cp39-cp39/bin/:$PATH
+ENV PATH /opt/python/cp36-cp36m/bin:/opt/python/cp37-cp37m/bin:/opt/python/cp38-cp38/bin:/opt/python/cp39-cp39/bin:/opt/python/cp310-cp310/bin:$PATH
 # Otherwise `cargo new` errors
 ENV USER root
 
@@ -37,6 +37,7 @@ RUN curl --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y \
     && python3.7 -m pip install --no-cache-dir cffi \
     && python3.8 -m pip install --no-cache-dir cffi \
     && python3.9 -m pip install --no-cache-dir cffi \
+    && python3.10 -m pip install --no-cache-dir cffi \
     && mkdir /io
 
 COPY --from=builder /usr/bin/maturin /usr/bin/maturin

guide/src/platform_support.md

@@ -33,7 +33,7 @@ supported by [manylinux](https://github.com/pypa/manylinux).
 
 ## Python Support
 
-CPython 3.6 to 3.9 are supported and tested on CI, though the entire 3.x series should work.
+CPython 3.7 to 3.10 are supported and tested on CI, though the entire 3.x series should work.
 This will be changed as new python versions are released and others have their end of life.
 
 PyPy 3.6 and later also works.