Issue #2090379 by tstoeckler: Change 'pattern' to 'path' in routing YAML file.

CHANGELOG.txt

 
 Libraries 8.x-3.x, xxxx-xx-xx
 -----------------------------
+#2090379 by tstoeckler: Change 'pattern' to 'path' in routing YAML file.
 #2058371 by gordon: Re-port to Drupal 8 (.info.yml, controllers, cache service, ...).
 #1779714 by tstoeckler, klonos: Wrong filepath in README.txt and fix JS testing.
 #1167496 by tstoeckler: Remove leftover libraries.test file.

tests/modules/libraries_test/libraries_test.routing.yml

 libraries_test_files:
-  pattern: '/libraries_test/files'
+  path: '/libraries_test/files'
   defaults:
     _content: Drupal\libraries_test\Controller\ExampleController::files
   requirements:
     _access: 'TRUE'
 libraries_test_integration_files:
-  pattern: '/libraries_test/integration_files'
+  path: '/libraries_test/integration_files'
   defaults:
     _content: Drupal\libraries_test\Controller\ExampleController::integration
   requirements:
     _access: 'TRUE'
 libraries_test_versions:
-  pattern: '/libraries_test/versions'
+  path: '/libraries_test/versions'
   defaults:
     _content: Drupal\libraries_test\Controller\ExampleController::versions
   requirements:
     _access: 'TRUE'
 libraries_test_variant:
-  pattern: '/libraries_test/variant'
+  path: '/libraries_test/variant'
   defaults:
     _content: Drupal\libraries_test\Controller\ExampleController::variant
   requirements:
     _access: 'TRUE'
 libraries_test_versions_and_variants:
-  pattern: '/libraries_test/versions_and_variants'
+  path: '/libraries_test/versions_and_variants'
   defaults:
     _content: Drupal\libraries_test\Controller\ExampleController::versionsAndVariants
   requirements:
     _access: 'TRUE'
 libraries_test_cache:
-  pattern: '/libraries_test/cache'
+  path: '/libraries_test/cache'
   defaults:
     _content: Drupal\libraries_test\Controller\ExampleController::cache
   requirements: