Update appveyor.yml

Author: aidanharan

appveyor.yml

@@ -5,9 +5,7 @@ build: off
 matrix:
   fast_finish: true
   allow_failures:
-    - ruby_version: "25"
     - ruby_version: "25-x64"
-    - ruby_version: "26"
     - ruby_version: "26-x64"
     - ruby_version: "27"
     - ruby_version: "27-x64"
@@ -39,3 +37,6 @@ environment:
     secure: VChrioaIWkf9iuuaSs4cryiA4honrADgZqNC0++begg=
   CI_AZURE_PASS:
     secure: cSQp8sk4urJYvq0utpsK+r7J+snJ2wpcdp8RdXJfB+w=
+  matrix:
+      - ruby_version: "25-x64"
+      - ruby_version: "26-x64"