Build: Run both regular & BrowserStack tests for real

The previous configuration wasn't correct: Travis configurations with a single
entry in the built matrix are treated in a special way & job expansion is not
being done.

Ref https://docs.travis-ci.com/user/build-matrix/#explicitly-included-jobs-inherit-the-first-value-in-the-array

Author: mgol

.travis.yml

@@ -1,7 +1,4 @@
-sudo: false
 language: node_js
-node_js:
-- '14'
 cache:
   directories:
   - node_modules
@@ -13,16 +10,16 @@ notifications:
     - "%{repository}#%{build_number} (%{branch} - %{commit} %{author}): %{message}
       - %{build_url}"
 env:
-  matrix:
-  - NPM_SCRIPT=ci
   global:
   # BROWSER_STACK_USERNAME
   - secure: epX4ZrtNIdYQP1XDX0+9q/tuVbqwDkWSaFEeVMYu5mDr2ww9pJSIVdQtmcvAx9S9iNLBe6omonsaana6pCOfTtSM2VcbhUFop9/sQliDtOT50l7OMLxuq7/ObawmAQcMc5HT8fRgdBzcRHLw01h3DufUZYDnnYmVqhjEull/paY=
   # BROWSER_STACK_ACCESS_KEY
   - secure: JvFcXKk35GoaM4GmzxHQrT3/GAuReXtz32CCEfHqY6rjpdjuAl/ZCtlgRCKn7n0CW9U5q1jD4vHdKkPvdgNyE7KaiGWxbldztytOiz6kFT8TOaajLsjhvkyLB7Oav6ENxBytQpweW1ZTzDndob0rKN4H9SF/xvPV4j6n0pMT7TM=
-matrix:
+jobs:
   fast_finish: true
   include:
+  - node_js: '14'
+    env: NPM_SCRIPT=ci
   - node_js: '14'
     env: NPM_SCRIPT=browserstack
 script: