Ignore file from npm pack.

.gitignore

@@ -34,4 +34,7 @@ local.properties
 node_modules/
 npm-debug.log
 lib/android/src/main/gen
-example/android/app/src/main/gen
+example/android/app/src/main/gen
+
+# build
+react-native-fast-image-*.tgz

.npmignore

@@ -4,6 +4,7 @@ docs
 # Build
 android/build
 ios/build
+react-native-fast-image-*.tgz
 
 # We need to ignore some things in submodules.
 # This probably isn't everything we'd like to ignore but it's good enough.