RELEASE: Go 1.21 (#216)

* sync: Go 1.21.0

* [release-branch.go1.21] crypto/tls: change SendSessionTicket to take an options struct

To allow for future evolution of the API, make
QUICConn.SendSessionTicket take a QUICSessionTicketOptions
rather than a single bool.

Change-Id: I798fd0feec5c7581e3c3574e2de99611c81df47f
Reviewed-on: https://go-review.googlesource.com/c/go/+/514997
Reviewed-by: Roland Shoemaker <roland@golang.org>
Run-TryBot: Damien Neil <dneil@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Marten Seemann <martenseemann@gmail.com>
(cherry picked from commit a915b99)
Reviewed-on: https://go-review.googlesource.com/c/go/+/515335
Auto-Submit: Damien Neil <dneil@google.com>
Co-Authored-By: Damien Neil <52544+neild@users.noreply.github.com>

* new: CI bump up to use Go 1.21.0 stable release

* fix: better CI streamline for multi-platform

---------

Co-authored-by: Damien Neil <52544+neild@users.noreply.github.com>

.github/workflows/go.yml

@@ -0,0 +1,29 @@
+# This workflow will build a golang project
+# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-go
+
+name: "Go"
+
+on:
+  push:
+    branches: [ "master" ]
+  pull_request:
+    branches: [ "master" ]
+
+jobs:
+  build:
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ "ubuntu-latest", "windows-latest", "macos-latest" ]
+        go: [ "1.20.x", "1.21.0" ]
+    runs-on: ${{ matrix.os }}
+    steps:
+    - uses: actions/checkout@v3
+    - uses: actions/setup-go@v4
+      with:
+        go-version: ${{ matrix.go }}
+    - run: go version
+    - name: Build
+      run: go build -v ./...
+    - name: Test
+      run: go test -v ./...