Headers option as function

Signed-off-by: Alan Cha <Alan.cha1@ibm.com>

Author: Alan-Cha

.travis.yml

@@ -1,16 +1,14 @@
-sudo: false
 language: node_js
 node_js:
-  - "8"
-  - "9"
   - "10"
-  - "11"
   - "12"
 
 os:
   - linux
   - osx
 
+dist: xenial
+
 install:
   - npm install
   - npm i -g typescript jest

package-lock.json

@@ -8,7 +8,7 @@
     "@types/jest": "^24.0.18",
     "graphql": "^14.5.0",
     "jest": "^24.8.0",
-    "lerna": "^3.4.3",
+    "lerna": "^3.22.1",
     "ts-jest": "^24.0.2",
     "typescript": "^3.5.3"
   },