tree dea78be12a3cbe9111c64f2672b3789967fa7f39
parent a3dde68770de810e0962e30575e6a810dff22650
author Alex Stewart <alexs.mac@gmail.com> 1573763970 +0000
committer Alex Stewart <alexs.mac@gmail.com> 1573763970 +0000

Update Travis CI to Bionic & Xcode 11.2

- Fix Homebrew Ruby errors by forcing brew update before install.
- Remove use of custom Eigen 3.3.4 on Linux in favour of default Bionic
  3.3.4 package.
- Update Android NDK version to R20b and build for arm64-v8.
- Fix erroneous string -> STRING in iOS toolchain file.

Change-Id: I041c2a08b92b8307c12bd8967159beb6984e3c65