Disabled compatiblity inspection for backported 'typing' (PY-18880)

python/src/com/jetbrains/python/inspections/PyCompatibilityInspection.java

@@ -62,6 +62,7 @@ import java.util.List;
 public class PyCompatibilityInspection extends PyInspection {
   public static List<String> BACKPORTED_PACKAGES = ImmutableList.<String>builder()
     .add("enum")
+    .add("typing")
     .build();
 
   public static final int LATEST_INSPECTION_VERSION = 1;

python/testData/inspections/PyCompatibilityInspection/backportedTyping.py

@@ -0,0 +1 @@
+import typing

python/testSrc/com/jetbrains/python/inspections/PyCompatibilityInspectionTest.java

@@ -181,6 +181,11 @@ public class PyCompatibilityInspectionTest extends PyTestCase {
     doTest();
   }
 
+  // PY-18880
+  public void testBackportedTyping() {
+    doTest();
+  }
+
   private void doTest(@NotNull LanguageLevel level) {
     runWithLanguageLevel(level, this::doTest);
   }