Update usage of shared tests repository (#12)

Now that this package is supporting 2 different major versions of the
PHP SDK, it is important we ensure the tests can run against both
branches. This necessitates some changes to the structure of our CI
tests.

Author: keelerm84

.circleci/config.yml

@@ -6,18 +6,23 @@ workflows:
       - linux-test:
           name: PHP 7.3
           docker-image: cimg/php:7.3
+          shared-tests: 4.x-dev
       - linux-test:
           name: PHP 7.4
           docker-image: cimg/php:7.4
+          shared-tests: 4.x-dev
       - linux-test:
           name: PHP 8.0
           docker-image: cimg/php:8.0
+          shared-tests: dev-main
 
 jobs:
   linux-test:
     parameters:
       docker-image:
         type: string
+      shared-tests:
+        type: string
 
     docker:
       - image: <<parameters.docker-image>>
@@ -33,6 +38,9 @@ jobs:
       - run:
           name: install dependencies
           command: composer install --no-progress
+      - run:
+          name: require appropriate shared tests package
+          command: composer require --dev 'launchdarkly/server-sdk-shared-tests:<<parameters.shared-tests>>'
       - run: mkdir -p ./phpunit
       - run:
           name: run tests

composer.json

@@ -1,8 +1,8 @@
 {
     "repositories": [
         {
-            "type": "path",
-            "url": "php-server-sdk-shared-tests"
+            "type": "vcs",
+            "url": "https://github.com/launchdarkly/php-server-sdk-shared-tests"
         }
     ],
     "name": "launchdarkly/server-sdk-redis-phpredis",
@@ -24,7 +24,6 @@
         "launchdarkly/server-sdk": ">=4.0.0 <6.0.0"
     },
     "require-dev": {
-        "launchdarkly/server-sdk-shared-tests": "@dev",
         "phpunit/phpunit": "^9"
     },
     "autoload": {