MAINT: Rust 1.22.1 was the first version with Copy for ManuallyDrop

Author: bluss

.travis.yml

@@ -4,14 +4,13 @@ env:
   - FEATURES='serde-1'
 matrix:
   include:
-    - rust: 1.20.0
+    - rust: 1.22.1
+      env:
+      - FEATURES='array-sizes-33-128 array-sizes-129-255'
     - rust: stable
       env:
         - NODEFAULT=1
         - NODROP_FEATURES='use_needs_drop'
-    - rust: 1.22.1
-      env:
-      - FEATURES='array-sizes-33-128 array-sizes-129-255'
     - rust: stable
       env:
       - FEATURES='array-sizes-33-128 array-sizes-129-255'