Merge #429

429: add caching to travis r=jswrenn a=meltinglava

This is so that the pipeline does not download and compile all the dependencies all the time. Its recompiles them when a new compiler is used.

Co-authored-by: Meltinglava <[email protected]>

Author: bors[bot]

.travis.yml

@@ -6,6 +6,7 @@ matrix:
     - rust: stable
     - rust: beta
     - rust: nightly
+cache: cargo # https://docs.travis-ci.com/user/languages/rust/#dependency-management
 branches:
   only:
     - master