Move environment variable for tests into travis yaml (when running test locally you can set the environment variable for the dev environment manually)

Author: Sean Newell

.travis.yml

@@ -9,6 +9,7 @@ install:
 script:
   - npm run lint
   - npm run build
+  - export SEQ_SILENT=true
   - npm run cover
 
 after_success:

package.json

@@ -10,9 +10,9 @@
     "prepare-test-v4": "npm install [email protected] && npm run build-tests-es6",
     "test-v3": "npm run prepare-test-v3 && npm run exec-tests",
     "test-v4": "npm run prepare-test-v4 && npm run exec-tests",
-    "cover-v3": "npm run prepare-test-v3 && SEQ_SILENT=true nyc --exclude 'lib/models/v4/**/*.js' --all --require source-map-support/register mocha 'test/specs/**/*.js'",
-    "cover-v4": "npm run prepare-test-v4 && SEQ_SILENT=true nyc --exclude 'lib/models/v3/**/*.js' --all --require source-map-support/register mocha 'test/specs/**/*.js'",
-    "exec-tests": "SEQ_SILENT=true mocha 'test/specs/**/*.js'",
+    "cover-v3": "npm run prepare-test-v3 && nyc --exclude 'lib/models/v4/**/*.js' --all --require source-map-support/register mocha 'test/specs/**/*.js'",
+    "cover-v4": "npm run prepare-test-v4 && nyc --exclude 'lib/models/v3/**/*.js' --all --require source-map-support/register mocha 'test/specs/**/*.js'",
+    "exec-tests": "mocha 'test/specs/**/*.js'",
     "test": "npm run test-v4 && npm run test-v3",
     "cover": "npm run cover-v4 && npm run cover-v3",
     "lint": "tslint ."