Merge pull request #117 from Treamz/master

Fix build.yaml parse error during build_runner execution

Author: ethanblake4

build.yaml

@@ -3,4 +3,5 @@ targets:
     builders:
       # Configure the builder `pkg_name|builder_name`
       # In this case, the member_count builder defined in `../example`
-      dart_eval_generator|member_count:
+      dart_eval_generator|member_count:
+        enabled: true