fix: Use lerna@3.3.0 on Travis to fix early CI build termination.

Author: amiller-gh

.travis.yml

@@ -15,6 +15,7 @@ addons:
     chrome: stable
 
 before_install:
+<<<<<<< HEAD
   - npm install -g lerna yarn
   - ./scripts/if-opticss-dev.sh ./scripts/checkout-opticss.sh ../opticss
   - ./scripts/if-opticss-dev.sh ./scripts/link-to-opticss.js --file ../opticss