Merge pull request #466 from erikgb/lint-modernize

Add new modernize golangci-lint linter

Author: cert-manager-prow[bot]

modules/go/.golangci.override.yaml

@@ -45,6 +45,7 @@ linters:
     - makezero
     - mirror
     - misspell
+    - modernize
     - musttag
     - nakedret
     - nilerr