Use go v1.17 (#120)

* `go mod edit -go=1.11`

* Bump go from 1.16 to 1.17

* Revert "`go mod edit -go=1.11`"

This reverts commit b205b48.

Since `go mod` gets an error:

```
go mod tidy: go.mod file indicates go 1.17, but maximum supported version is 1.16
```_

Author: toshimaru

.github/workflows/ci.yml

@@ -17,7 +17,7 @@ jobs:
     - uses: actions/checkout@v2
     - uses: actions/setup-go@v2
       with:
-        go-version: '1.16'
+        go-version: '1.17'
     - name: Build & Test
       run: |
         go build -v

.github/workflows/coverage.yml

@@ -7,7 +7,7 @@ jobs:
     - uses: actions/checkout@v2
     - uses: actions/setup-go@v2
       with:
-        go-version: '1.16'
+        go-version: '1.17'
     - run: go build
     - uses: paambaati/codeclimate-action@v2.7.5
       env:

.github/workflows/release.yml

@@ -12,7 +12,7 @@ jobs:
       run: git fetch --prune --unshallow
     - uses: actions/setup-go@v2
       with:
-        go-version: '1.16'
+        go-version: '1.17'
     - name: Release via goreleaser
       uses: goreleaser/goreleaser-action@v2
       with:

.github/workflows/reviewdog.yml

@@ -8,7 +8,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-go@v2
         with:
-          go-version: '1.16'
+          go-version: '1.17'
       - name: install tools
         run: |
           go get -u golang.org/x/lint/golint