Update Go version to 1.19

- [ci] update actions/setup-go to v3
- [ci] get go version from go.mod

.github/workflows/tests.yml

@@ -12,15 +12,15 @@ jobs:
 
     strategy:
       matrix:
-        go: ['1.17', '1.16', '1.15', '1.14']
+        go: ['1.19']
 
     name: Go ${{ matrix.go }}
 
     steps:
     - uses: actions/checkout@v2
 
     - name: Set up Go
-      uses: actions/setup-go@v2
+      uses: actions/setup-go@v3
       with:
         go-version: ${{ matrix.go }}
 
@@ -38,9 +38,9 @@ jobs:
     - uses: actions/checkout@v2
 
     - name: Set up Go
-      uses: actions/setup-go@v2
+      uses: actions/setup-go@v3
       with:
-        go-version: "1.17"
+        go-version-file: 'go.mod'
 
     - name: Test
       run: |
@@ -61,9 +61,9 @@ jobs:
     - uses: actions/checkout@v2
 
     - name: Set up Go
-      uses: actions/setup-go@v2
+      uses: actions/setup-go@v3
       with:
-        go-version: '1.17'
+        go-version-file: 'go.mod'
 
     - name: Ensure no formatting changes
       run: |

go.mod

@@ -1,18 +1,23 @@
 module github.com/canonical/pebble
 
-go 1.14
+go 1.19
 
 require (
 	github.com/gorilla/mux v1.8.0
 	github.com/gorilla/websocket v1.4.2
 	github.com/jessevdk/go-flags v1.4.0
-	github.com/kr/text v0.2.0 // indirect
 	github.com/pkg/term v1.1.0
 	golang.org/x/crypto v0.0.0-20201221181555-eec23a3978ad
-	golang.org/x/net v0.0.0-20210119194325-5f4716e94777 // indirect
 	golang.org/x/sys v0.0.0-20210119212857-b64e53b001e4
 	gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c
 	gopkg.in/tomb.v2 v2.0.0-20161208151619-d5d1b5820637
 	gopkg.in/yaml.v2 v2.4.0
 	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b
 )
+
+require (
+	github.com/kr/pretty v0.2.1 // indirect
+	github.com/kr/text v0.2.0 // indirect
+	golang.org/x/net v0.0.0-20210119194325-5f4716e94777 // indirect
+	golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1 // indirect
+)