Add env variables for mongo uri in yaml file

.travis.yml

@@ -1,11 +1,14 @@
 language: node_js
 node_js:
-  - '10.16.2'
+- 10.16.2
 addons:
   apt:
     packages:
-      - xvfb
+    - xvfb
 before_install:
-  - export DISPLAY=':99.0'
-  - Xvfb :99 -screen 0 1024x768x24 > /dev/null 2>&1 &
-cache: npm
+- export DISPLAY=':99.0'
+- Xvfb :99 -screen 0 1024x768x24 > /dev/null 2>&1 &
+cache: npm
+env:
+  global:
+    secure: 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