reactnative - unable to modify info.plist

I'm using the react-native-image-picker package in my app. The post installation instructions for iOS say to add these keys inside info.plist.

<key>NSPhotoLibraryUsageDescription</key>
    <string>$(PRODUCT_NAME) would like access to your photo gallery</string>
    <key>NSCameraUsageDescription</key>
    <string>$(PRODUCT_NAME) would like to use your camera</string>
    <key>NSPhotoLibraryAddUsageDescription</key>
    <string>$(PRODUCT_NAME) would like to save photos to your photo gallery</string>
    <key>NSMicrophoneUsageDescription</key>
    <string>$(PRODUCT_NAME) would like to use your microphone (for videos)</string>

I am able to edit info.plist and "save" it but after running react-native run-ios info.plist reverts back to the original. I checked the file permissions and I have both Read & Write.