CI check for Go code formatting (#206)

Signed-off-by: jay-dee7 <jasdeepsingh.uppal@gmail.com>
Co-authored-by: jay-dee7 <jasdeepsingh.uppal@gmail.com>

.github/workflows/build.yml

@@ -33,6 +33,13 @@ jobs:
         uses: actions/setup-go@v3
         with:
           go-version: "${{ matrix.go }}"
+      - name: Check Go code formatting
+        run: |
+          if [ "$(gofmt -s -l . | wc -l)" -gt 0 ]; then
+            gofmt -s -l .
+            echo "Please format Go code by running: go fmt ./..."
+            exit 1
+          fi
       - name: Build
         run: |
           go vet ./...

rsa_pss.go

@@ -1,3 +1,4 @@
+//go:build go1.4
 // +build go1.4
 
 package jwt

token.go

@@ -7,7 +7,6 @@ import (
 	"time"
 )
 
-
 // DecodePaddingAllowed will switch the codec used for decoding JWTs respectively. Note that the JWS RFC7515
 // states that the tokens will utilize a Base64url encoding with no padding. Unfortunately, some implementations
 // of JWT are producing non-standard tokens, and thus require support for decoding. Note that this is a global