title: Need to upgrade RN version of existing project
body: <p>I'm using react-native version 0.59.5. I need to upgrade my react-native to latest version 61.2. Can someone help me with this. Do I have to make changes with podfile???</p>
  
  <pre><code>React Native Environment Info:
      System:
        OS: macOS 10.14.6
        CPU: (4) x64 Intel(R) Core(TM) i5-3210M CPU @ 2.50GHz
        Memory: 2.56 GB / 16.00 GB
        Shell: 3.2.57 - /bin/bash
      Binaries:
        Node: 12.4.0 - /usr/local/bin/node
        npm: 6.9.2 - /usr/local/bin/npm
        Watchman: 4.9.0 - /usr/local/bin/watchman
      SDKs:
        iOS SDK:
          Platforms: iOS 13.1, DriverKit 19.0, macOS 10.15, tvOS 13.0, watchOS 6.0
      IDEs:
        Android Studio: 3.5 AI-191.8026.42.35.5900203
        Xcode: 11.1/11A1027 - /usr/bin/xcodebuild
      npmPackages:
        react: 16.8.3 =&gt; 16.8.3 
        react-native: 0.59.5 =&gt; 0.59.5 
      npmGlobalPackages:
        react-native-cli: 2.0.1
  </code></pre>
  
  <p>I used react-native upgrade my whole podfile is showing conflicts</p>
  
  <p>Need to upgrade to latest version of react-native in existing project. I got the following error</p>
  
  <pre><code>info No version passed. Fetching latest...
  info Fetching diff between v0.59.5 and v0.61.2...
  info Applying diff...
  warn Excluding files that exist in the template, but not in your project:
    - android/app/src/main/java/com/bublenet/MainActivity.java
    - android/app/src/main/java/com/bublenet/MainApplication.java
    - ios/bublenet-tvOS/Info.plist
    - ios/bublenet.xcodeproj/project.pbxproj
    - ios/bublenet/Info.plist
    - ios/bublenetTests/bublenetTests.m
  error Excluding files that failed to apply the diff:
    - App.js
    - android/app/build.gradle
    - android/app/proguard-rules.pro
    - android/build.gradle
    - android/gradlew.bat
    - android/settings.gradle
    - ios/Podfile
    - ios/bublenet.xcworkspace/contents.xcworkspacedata
  Please make sure to check the actual changes after the upgrade command is finished.
  You can find them in our Upgrade Helper web app: https://react-native-community.github.io/upgrade-helper/?from=0.59.5&amp;to=0.61.2
  error Automatically applying diff failed. We did our best to automatically upgrade as many files as possible
  warn Continuing after failure. Some of the files are upgraded but you will need to deal with conflicts manually
  info Installing "react-native@0.61.2" and its peer dependencies...
  info Running "git status" to check what changed...
  On branch upgrading_rn
  Changes to be committed:
    (use "git reset HEAD &lt;file&gt;..." to unstage)
  
      new file:   .eslintrc.js
      new file:   .prettierrc.js
      new file:   android/app/debug.keystore
      modified:   android/app/src/main/res/values/styles.xml
      modified:   android/gradle/wrapper/gradle-wrapper.jar
      modified:   android/gradlew
      deleted:    android/keystores/BUCK
      deleted:    android/keystores/debug.keystore.properties
      modified:   package-lock.json
      modified:   package.json
  
  Unmerged paths:
    (use "git reset HEAD &lt;file&gt;..." to unstage)
    (use "git add &lt;file&gt;..." to mark resolution)
  
      both modified:   .flowconfig
      both modified:   .gitignore
      both modified:   android/gradle.properties
      both modified:   android/gradle/wrapper/gradle-wrapper.properties
  
  Changes not staged for commit:
    (use "git add &lt;file&gt;..." to update what will be committed)
    (use "git checkout -- &lt;file&gt;..." to discard changes in working directory)
  
      modified:   ios/Podfile.lock
      modified:   ios/bublenet.xcworkspace/xcshareddata/WorkspaceSettings.xcsettings
  
  warn Please run "git diff" to review the conflicts and resolve them
  info You may find these resources helpful:
  • Release notes: https://github.com/facebook/react-native/releases/tag/v0.61.2
  • Manual Upgrade Helper: https://react-native-community.github.io/upgrade-helper/?from=0.59.5&amp;to=0.61.2
  • Git diff: https://raw.githubusercontent.com/react-native-community/rn-diff-purge/diffs/diffs/0.59.5..0.61.2.diff
  error Upgrade failed. Please see the messages above for details. Run CLI with --verbose flag for more details.
  </code></pre>