Adjust the 'highest' tests.

Run 'composer update' with the '--no-scripts' flag to avoid building other scenarios. After that,
run 'composer install' so that composer/installers can place dependencies in the right locations, etc.

Author: greg-1-anderson

.circleci/config.yml

@@ -98,7 +98,8 @@ jobs:
       - run: composer require --dev drupal/core:8.7.x-dev --no-update
       - run: composer require --dev webflo/drupal-core-require-dev:8.7.x-dev --no-update
       - run: composer config platform.php 7.2
-      - run: composer update
+      - run: composer update --no-scripts
+      - run: composer install
       - run: composer lint
       - run: composer functional