Refresh npm authentication token (close snowplow#688)

Author: mhadam

.travis.yml

@@ -49,7 +49,7 @@ env:
   # AWS_SECRET_KEY
   - secure: C+PTon3PsELG2bFlAZ5qfinWVih8XxlZV45Gk2W5i2CK1AROJ60lnfhgYZM4YidIRcA/V/zbm8tDgZbA8i/MVKcO5f1qbD5Skyo2fEFRlXoSWhtwaScViihN338U/SsEviKThIGSSLgdfsQ0CW7TYxvetFSwXFyZPPrYrenF3dk=
   # NPM_AUTH_TOKEN
-  - secure: Th+zA06xGaBxv+y1/lEcJOftaJNr9v4dYWhBkr6T+SB3AsNlh+eSXRyc5OsDKBQFburk5q6snz/OE3fvm4wvWkkGEXhdyRaAI3HkKBtZB691iuhSttIutLbWvVRnKkObhLP5ecK3818gbJibzJkcJfTEximw9GHkTAcOEwiMIkA=
+  - secure: Dtc3aFnUfquuC+E3ZOvs57SZy3Sp+3QdXQHR0xjekvpF4FgaKvDpISBfLTCs1ODuHZ+K1pPn9/i4yGNE7ei8z3VTbRY4nYPM5VG7jlqwP1iaFqRopnQmpV9c7yhMSHKhXrSWj/Gwo/9UHpia6muQUSK4hbPvhZMf0Rd3s06Z07M=
   - AWS_S3_BUCKET=snowplow-static-js
   - AWS_REGION=eu-west-1
   - AWS_CF_DISTRIBUTION=E1RICD7QD0F2KE

.travis/deploy.py

@@ -114,12 +114,12 @@ def npm_credentials():
     if os.path.isfile(npmrc):
         os.remove(npmrc)
         print("WARNING! ~/.npmrc already exists. It should be deleted after each use")
-        print("Overrinding existing ~/.npmrc")
+        print("Overwriting existing ~/.npmrc")
     else:
         print("Creating ~/.npmrc")
 
     with open(npmrc, 'a') as f:
-        f.write("registry=http://registry.npmjs.org/\n//registry.npmjs.org/:_authToken=" + NPM_AUTH_TOKEN)
+        f.write("registry=https://registry.npmjs.org/\n//registry.npmjs.org/:_authToken=" + NPM_AUTH_TOKEN)
 
     yield