Update appveyor.yml

Author: aidanharan

appveyor.yml

@@ -5,8 +5,8 @@ build: off
 matrix:
   fast_finish: true
   allow_failures:
-    - ruby_version: "25-x64"
-    - ruby_version: "26-x64"
+    - ruby_version: "25"
+    - ruby_version: "26"
     - ruby_version: "27"
     - ruby_version: "27-x64"
 services:
@@ -38,5 +38,9 @@ environment:
   CI_AZURE_PASS:
     secure: cSQp8sk4urJYvq0utpsK+r7J+snJ2wpcdp8RdXJfB+w=
   matrix:
-      - ruby_version: "25-x64"
-      - ruby_version: "26-x64"
+    - ruby_version: "25-x64"
+    - ruby_version: "25"
+    - ruby_version: "26-x64"
+    - ruby_version: "26"
+    - ruby_version: "27-x64"
+    - ruby_version: "27"