Fix linter

.github/workflows/ios.yml

@@ -12,10 +12,10 @@ jobs:
     runs-on: macos-latest
 
     steps:
-      - name: Set up xcode 13.0
+      - name: Set up xcode 12.2
         uses: maxim-lobanov/setup-xcode@v1
         with:
-          xcode-version: 13.0
+          xcode-version: 12.2
         id: xcode
 
       - name: Set up Go 1.x

.golangci.yml

@@ -42,3 +42,5 @@ linters:
     - nilerr            # Force return err when not nil
     - wrapcheck         # Force wrapping of external error TODO: when the bug is fixed update the linter
     - gomoddirectives   # Prohibits the use of replace statements
+    - varnamelen        # Forbids short var names
+    - ireturn           # Prevents returning interfaces

crypto/message_test.go

@@ -214,7 +214,6 @@ func TestIssue11(t *testing.T) {
 	assert.Exactly(t, "message from sender", plainMessage.GetString())
 }
 
-
 func TestDummy(t *testing.T) {
 	pgp.latestServerTime = 1636644417
 	defer func() { pgp.latestServerTime = testTime }()