Add Python 3.11 to Github Actions builds (#306)

* Add Python3.11 to the Github Actions, in the manylinux2014 build as well as the
packaging test.

I added a second image, x86_64, to the manylinux2014 build matrix - the i686
build didn't immediately pass, so I left it out.

* Move the bundled capnproto library forward to 0.10.3.

* Remove the 2010 build entirely, and update the 2014 build to include i686.

.github/workflows/packagingtest.yml

@@ -12,7 +12,7 @@ jobs:
       matrix:
         # Some asyncio commands require 3.7+
         # It may be possible to use 3.6 and maybe 3.5; however, this will take some patching to get examples to work
-        python-version: [3.7, 3.8, 3.9, "3.10"]
+        python-version: [3.7, 3.8, 3.9, "3.10", "3.11"]
         os: [ubuntu-latest, macOS-latest, windows-2019]
         arch: ["x86_64"]
         include:
@@ -28,6 +28,9 @@ jobs:
           - python-version: "3.10"
             os: macOS-latest
             arch: arm64
+          - python-version: "3.11"
+            os: macOS-latest
+            arch: arm64
 
     steps:
     - uses: actions/checkout@v2