Fix build

.gitignore

@@ -1,10 +1,6 @@
-lib/
+# Dependency directory
 node_modules
 
-.idea
-*.iml
-__tests__/runner/*
-
 # Rest pulled from https://github.com/github/gitignore/blob/master/Node.gitignore
 # Logs
 logs
@@ -93,3 +89,14 @@ typings/
 
 # DynamoDB Local files
 .dynamodb/
+
+# OS metadata
+.DS_Store
+Thumbs.db
+
+# Ignore built ts files
+__tests__/runner/*
+lib/**/*
+
+.idea/
+*.iml