👷 Added golangci-lint and Travis CI test

.github/workflows/golangci-lint.yml

@@ -0,0 +1,19 @@
+name: golangci-lint
+on: [push, pull_request]
+jobs:
+  golangci:
+    name: lint
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: golangci-lint
+        uses: golangci/golangci-lint-action@v2
+        with:
+          # Required: the version of golangci-lint is required and must be specified without patch version: we always use the latest patch version.
+          version: v1.30
+
+          # Optional: golangci-lint command line arguments.
+          args: --issues-exit-code=0 --exclude-use-default --enable-all -D asciicheck -D depguard -D dogsled -D funlen -D gci -D gochecknoglobals -D gochecknoinits -D gocognit -D gocyclo -D godot -D godox -D goheader -D gomodguard -D nlreturn -D noctx -D bodyclose -D rowserrcheck -D sqlclosecheck -D stylecheck -D testpackage -D wsl
+
+          # Optional: show only new issues if it's a pull request. The default value is `false`.
+          only-new-issues: true

.travis.yml

@@ -0,0 +1,14 @@
+language: go
+
+go:
+  - "1.11"  # Debian Stable golang version
+  - "1.12"
+  - "1.13"
+  - "1.14"
+  - "1.15"
+
+script:
+  - go test ./...
+  - go build
+
+# TODO: GitHub Releases deploy