Define travis env vars as global.. whoops

.travis.yml

@@ -1,12 +1,13 @@
 language: ruby
 
 env:
-  - DOCKER_COMPOSE_VERSION=1.24.0
-  - POSTGRES_DB=pokemon_trade_test
-  - POSTGRES_HOST=test_db
-  - POSTGRES_PASSWORD=postgres
-  - POSTGRES_PORT=5432
-  - POSTGRES_USER=pokemon_trade
+  global:
+    - DOCKER_COMPOSE_VERSION=1.24.0
+    - POSTGRES_DB=pokemon_trade_test
+    - POSTGRES_HOST=test_db
+    - POSTGRES_PASSWORD=postgres
+    - POSTGRES_PORT=5432
+    - POSTGRES_USER=pokemon_trade
 
 services:
   - docker