fix: added more flexibility to the golang-lint regex for header. (#53)

A single tab should be valid on the // http://www.apache.org/licenses/LICENSE-2.0 line since that's what gofumpt seems to like to do. The current regex is looking for atleast 2 tabs.

Author: bradegler

.golangci.yml

@@ -113,7 +113,7 @@ linters-settings:
     values:
       regexp:
         YEAR_AUTHOR: '\d{4} .*'
-        INDENTATION: '[\t\f ]{2,}'
+        INDENTATION: '[\t\f]+|[ ]{2,}'
     # default: ""
     template: |-
       Copyright {{ YEAR_AUTHOR }}