Remove unsupported Node.js versions for Appveyor.

Author: octalmage

appveyor.yml

@@ -4,8 +4,6 @@
 environment:
   matrix:
   # node.js
-    - nodejs_version: "0.10"
-    - nodejs_version: "0.12"
     - nodejs_version: "4"
     - nodejs_version: "5"
     - nodejs_version: "6"
@@ -31,4 +29,4 @@ test_script:
 
 build: off
 
-version: "{build}"
+version: "{build}"