Add more packages to dependabot config (#1341)

Summary:
Adding more packages.

Pull Request resolved: https://github.com/facebook/flipper/pull/1341

Test Plan: ![Screenshot 2020-07-08 10 08 06](https://user-images.githubusercontent.com/9906/86900187-edaf3780-c102-11ea-8eb3-f692bba6ea29.png)

Reviewed By: mweststrate

Differential Revision: D22430656

Pulled By: passy

fbshipit-source-id: 7090bdb46bea08eeadcbad90b6100319f50add5c

.github/dependabot.yml

@@ -6,6 +6,30 @@ updates:
     interval: weekly
     time: '13:00'
   open-pull-requests-limit: 10
+- package-ecosystem: npm
+  directory: "/flipper-js-client-sdk"
+  schedule:
+    interval: weekly
+    time: '13:00'
+  open-pull-requests-limit: 10
+- package-ecosystem: npm
+  directory: "/react-native/ReactNativeFlipperExample"
+  schedule:
+    interval: weekly
+    time: '13:00'
+  open-pull-requests-limit: 10
+- package-ecosystem: npm
+  directory: "/react-native/react-native-flipper"
+  schedule:
+    interval: weekly
+    time: '13:00'
+  open-pull-requests-limit: 10
+- package-ecosystem: gradle
+  directory: "/android"
+  schedule:
+    interval: weekly
+    time: '13:00'
+  open-pull-requests-limit: 10
 - package-ecosystem: cargo
   directory: "/packer"
   schedule: