Update iOS dependencies

[ewpatton]

Change-Id: Ic6ba9c7c4d2b268c9ba92b32ffb37bc5de1234a2

General items:

• I have updated the relevant documentation files under docs/
• My code follows the:
  • Google Java style guide (for .java files)
  • Google JavaScript style guide (for .js files)
• ant tests passes on my machine

If your code changes how something works on the device (i.e., it affects the companion):

• I branched from ucr
• My pull request has ucr as the base

Further, if you've changed the blocks language or another user-facing designer/blocks API (added a SimpleProperty, etc.):

• I have updated the corresponding version number in YaVersion.java
• I have updated the corresponding upgrader in YoungAndroidFormUpgrader.java (components only)
• I have updated the corresponding entries in versioning.js

For all other changes:

• I branched from master
• My pull request has master as the base

What does this PR accomplish?

Description

Updates the iOS pods to the latest versions. This includes a fix for the Google libraries that cause a crash when using authenticated Spreadsheet access in release builds.

To test, set up credentials for a Google Spreadsheet and set up the Spreadsheet component to use those credentials. Using any block to interact with the spreadsheet will cause the app to crash, but only when compiled as a release binary (Ad Hoc or App Store).