Add missing tool dependencies to tools.go (#104)

This fixes the issue that releases with GoReleaser would fail because
the repo wasn't in a clean state due to `go.mod`/`go.sum`being modified.

Signed-off-by: Reinhard Nägele <unguiculus@gmail.com>

.github/workflows/ci.yaml

@@ -16,7 +16,7 @@ jobs:
       - name: Setup Go
         uses: actions/setup-go@v2
         with:
-          go-version: "1.14.5"
+          go-version: "1.15.8"
 
       - name: Cache
         uses: actions/cache@v2
@@ -32,10 +32,8 @@ jobs:
       - name: Check License Headers
         run: mage -v checkLicenseHeaders
 
-# Commented out because it randomly changes go.mod and go.sum.
-# This needs some investigation.
-#      - name: Lint
-#        run: mage -v lint
+      - name: Lint
+        run: mage -v lint
 
       - name: Test
         run: mage -v test

.github/workflows/release.yaml

@@ -19,7 +19,7 @@ jobs:
       - name: Setup Go
         uses: actions/setup-go@v2
         with:
-          go-version: "1.14.5"
+          go-version: "1.15.8"
 
       - name: Cache
         uses: actions/cache@v2

go.mod

@@ -1,41 +1,31 @@
 module github.com/helm/chart-releaser
 
-go 1.14
+go 1.15
 
 require (
 	github.com/Azure/go-autorest/autorest/azure/auth v0.5.3 // indirect
 	github.com/Azure/go-autorest/autorest/to v0.3.0 // indirect
 	github.com/Azure/go-autorest/autorest/validation v0.2.0 // indirect
 	github.com/Songmu/retry v0.1.0
-	github.com/google/go-cmp v0.5.2 // indirect
+	github.com/golangci/golangci-lint v1.37.0
 	github.com/google/go-github/v30 v30.0.0
 	github.com/goreleaser/goreleaser v0.129.0
 	github.com/jmoiron/sqlx v1.2.1-0.20190826204134-d7d95172beb5 // indirect
-	github.com/kr/text v0.2.0 // indirect
 	github.com/magefile/mage v1.10.0
-	github.com/mattn/go-colorable v0.1.7 // indirect
 	github.com/mitchellh/go-homedir v1.1.0
-	github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e // indirect
-	github.com/onsi/ginkgo v1.13.0 // indirect
 	github.com/pkg/errors v0.9.1
-	github.com/rogpeppe/go-internal v1.6.0 // indirect
-	github.com/spf13/cobra v1.0.0
+	github.com/spf13/cobra v1.1.3
 	github.com/spf13/jwalterweatherman v1.1.0 // indirect
 	github.com/spf13/pflag v1.0.5
 	github.com/spf13/viper v1.7.1
-	github.com/stretchr/testify v1.6.1
+	github.com/stretchr/testify v1.7.0
 	golang.org/x/oauth2 v0.0.0-20200107190931-bf48bf16ab8d
-	golang.org/x/tools v0.0.0-20200812195022-5ae4c3c160a0
-	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
-	gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f // indirect
+	golang.org/x/tools v0.1.0
 	helm.sh/helm/v3 v3.4.0
-	honnef.co/go/tools v0.0.1-2020.1.5 // indirect
 	rsc.io/letsencrypt v0.0.3 // indirect; indirect)
 )
 
 exclude (
 	github.com/Azure/go-autorest v0.9.0
 	github.com/Azure/go-autorest v12.0.0+incompatible
 )
-
-replace golang.org/x/sys => golang.org/x/sys v0.0.0-20200826173525-f9321e4c35a6