chore: Build with Go 1.20, keep minimum at 1.18 for now (#5353)

.github/workflows/ci.yml

@@ -19,7 +19,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ ubuntu-latest, macos-latest, windows-latest ]
-        go: [ '1.18', '1.19' ]
+        go: [ '1.18', '1.20' ]
 
         include:
         # Set the minimum Go patch version for the given Go minor
@@ -27,8 +27,8 @@ jobs:
         - go: '1.18'
           GO_SEMVER: '~1.18.4'
 
-        - go: '1.19'
-          GO_SEMVER: '~1.19.0'
+        - go: '1.20'
+          GO_SEMVER: '~1.20.0'
 
         # Set some variables per OS, usable via ${{ matrix.VAR }}
         # CADDY_BIN_PATH: the path to the compiled Caddy binary, for artifact publishing

.github/workflows/cross-build.yml

@@ -16,13 +16,13 @@ jobs:
       fail-fast: false
       matrix:
         goos: ['android', 'linux', 'solaris', 'illumos', 'dragonfly', 'freebsd', 'openbsd', 'plan9', 'windows', 'darwin', 'netbsd']
-        go: [ '1.19' ]
+        go: [ '1.20' ]
 
         include:
         # Set the minimum Go patch version for the given Go minor
         # Usable via ${{ matrix.GO_SEMVER }}
-        - go: '1.19'
-          GO_SEMVER: '~1.19.0'
+        - go: '1.20'
+          GO_SEMVER: '~1.20.0'
 
     runs-on: ubuntu-latest
     continue-on-error: true

.github/workflows/release.yml

@@ -11,13 +11,13 @@ jobs:
     strategy:
       matrix:
         os: [ ubuntu-latest ]
-        go: [ '1.19' ]
+        go: [ '1.20' ]
 
         include:
         # Set the minimum Go patch version for the given Go minor
         # Usable via ${{ matrix.GO_SEMVER }}
-        - go: '1.19'
-          GO_SEMVER: '~1.19.0'
+        - go: '1.20'
+          GO_SEMVER: '~1.20.0'
 
     runs-on: ${{ matrix.os }}
     # https://github.com/sigstore/cosign/issues/1258#issuecomment-1002251233