fix(footer)!: Allow capitals in footer

Spec actually doesn't mention anything about capitals, only mentions
that breaking changes is the only one that can have Spaces, therefore
capitals are allowed in the footer

Author: coolapso

cmd/footer.go

@@ -52,18 +52,11 @@ func lintFooter(f []string) (errs []error) {
 					}
 				}
 
-				if s[0] == strings.ToUpper(s[0]) {
-					errs = append(errs, errInvalidFooterUpperCase)
-				}
-
 				if strings.Contains(s[0], " ") {
 					errs = append(errs, errInvalidFooterSpace)
 				}
 			}
 
-			if s[1] == strings.ToUpper(s[1]) {
-				errs = append(errs, errInvalidFooterUpperCase)
-			}
 		}
 	}
 

cmd/footer_test.go

@@ -80,26 +80,6 @@ func TestLintFooter(t *testing.T) {
 		}
 	})
 
-	t.Run("invalid capitals", func(t *testing.T) {
-		trailers := [][]string{
-			{"KEY: VALUE"},
-			{"KEY: value"},
-			{"key: VALUE"},
-		}
-		want := errInvalidFooterUpperCase
-
-		for _, trailer := range trailers {
-			got := lintFooter(trailer)
-			if got == nil {
-				t.Fatal("want error got nil")
-			}
-
-			if !slices.Contains(got, want) {
-				t.Fatalf("Trailer: [ %v ], want error: [ %v ], got: %v", trailer, want, got)
-			}
-		}
-	})
-
 	t.Run("invalid keys with spaces", func(t *testing.T) {
 		trailer := []string{"key pair: value"}
 		want := errInvalidFooterSpace