chore(travis): normalize travis configs

Author: christopherthielen

.travis.yml

@@ -5,23 +5,24 @@ before_install:
 - export PATH=$HOME/.yarn/bin:$PATH
 - curl -o- -L https://yarnpkg.com/install.sh | bash -s -- --version 1.5.1
 script:
-- if [ "x${CORE_BRANCH}x" != "xx" ]; then npx publish_yalc_package .downstream_cache/core https://github.com/ui-router/core.git && yalc add @uirouter/core && export UPSTREAM_PKGS=@uirouter/core; fi
-- tsc
-- yarn test
-- yarn docs
-- yarn test:downstream
+- if [ "x${CORE_BRANCH}x" != "xx" ]; then npx publish_yalc_package .downstream_cache/core https://github.com/ui-router/core.git && yalc add @uirouter/core ; fi
+- tsc &&
+  yarn test &&
+  yarn docs &&
+  yarn test:downstream
 env:
   matrix:
   - CORE_BRANCH=
-  - CORE_BRANCH=master
+  - CORE_BRANCH=master UPSTREAM_PKGS=@uirouter/core
 notifications:
   slack:
     on_success: never
     rooms:
       secure: alXA+pERLtF4DNctl+WaISO3uzUA/JzVCzSrDlNsV9Jvx1HdAqRNbrrnNYzCZBIU6OOv5YBGFbq79v5NPKzMPzoR8dp3PahlxRgucxALweoTCXY5DuDHVSI9ULLl2PND7QOfKyUALuAz5nmT7omPVxRKCpBkVsqewLfMeW1MRgE=
 sudo: false
+git:
+  depth: 3
 cache:
-  yarn: true
   directories:
-  - ".downstream_cache"
   - node_modules
+  - ".downstream_cache"