ci: add golangci-lint run

Had to disable errcheck linter, as there are too many warnings
yet to be fixed.

Signed-off-by: Kir Kolyshkin <[email protected]>

Author: kolyshkin

.github/workflows/test.yml

@@ -9,6 +9,15 @@ on:
   pull_request:
 
 jobs:
+
+  lint:
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v2
+      - uses: golangci/golangci-lint-action@v2
+        with:
+          version: v1.42
+
   test:
     runs-on: ubuntu-20.04
     strategy:

.golangci.yml

@@ -0,0 +1,5 @@
+# For documentation, see https://golangci-lint.run/usage/configuration/
+
+linters:
+  disable:
+    - errcheck