drop support for Go 1.20, build on Go 1.22rc1 on CI (#4195)

* drop support for Go 1.20

* ci: udpate CircleCI to Go 1.21

* qtls: remove unnecessary type aliases

* ci: build using Go 1.22rc1

.github/workflows/cross-compile.yml

@@ -4,12 +4,12 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        go: [ "1.20.x", "1.21.x" ]
+        go: [ "1.21.x", "1.22.0-rc.1" ]
     runs-on: ${{ fromJSON(vars['CROSS_COMPILE_RUNNER_UBUNTU'] || '"ubuntu-latest"') }}
     name: "Cross Compilation (Go ${{matrix.go}})"
     steps:
       - uses: actions/checkout@v4
-      - uses: actions/setup-go@v4
+      - uses: actions/setup-go@v5
         with:
           go-version: ${{ matrix.go }}
       - name: Install build utils

.github/workflows/integration.yml

@@ -6,7 +6,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ "ubuntu" ]
-        go: [ "1.20.x", "1.21.x" ]
+        go: [ "1.21.x", "1.22.0-rc.1" ]
         include:
           - os: "windows"
             go: "1.21.x"
@@ -22,7 +22,7 @@ jobs:
     name: Integration Tests (${{ matrix.os }}, Go ${{ matrix.go }})
     steps:
       - uses: actions/checkout@v4
-      - uses: actions/setup-go@v4
+      - uses: actions/setup-go@v5
         with:
           go-version: ${{ matrix.go }}
       - run: go version

.github/workflows/lint.yml

@@ -5,9 +5,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: actions/setup-go@v4
+      - uses: actions/setup-go@v5
         with:
-          skip-pkg-cache: true
           go-version: "1.21.x"
       - name: Check that no non-test files import Ginkgo or Gomega
         run: .github/workflows/no_ginkgo.sh
@@ -39,11 +38,11 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        go: [ "1.20.x", "1.21.x" ]
+        go: [  "1.21.x", "1.22.0-rc.1" ]
     name: golangci-lint (Go ${{ matrix.go }})
     steps:
       - uses: actions/checkout@v4
-      - uses: actions/setup-go@v4
+      - uses: actions/setup-go@v5
         with:
           go-version: ${{ matrix.go }}
       - name: golangci-lint (Linux)

.github/workflows/unit.yml

@@ -7,12 +7,12 @@ jobs:
       fail-fast: false
       matrix:
         os: [ "ubuntu", "windows", "macos" ]
-        go: [ "1.20.x", "1.21.x" ]
+        go: [ "1.21.x", "1.22.0-rc.1" ]
     runs-on: ${{ fromJSON(vars[format('UNIT_RUNNER_{0}', matrix.os)] || format('"{0}-latest"', matrix.os)) }}
     name: Unit tests (${{ matrix.os}}, Go ${{ matrix.go }})
     steps:
       - uses: actions/checkout@v4
-      - uses: actions/setup-go@v4
+      - uses: actions/setup-go@v5
         with:
           go-version: ${{ matrix.go }}
       - run: go version