test: standardize on PostgreSQL for testing and force environment variables

Author: dotMavriQ

phpunit.xml

@@ -23,8 +23,12 @@
         <env name="BCRYPT_ROUNDS" value="4" force="true"/>
         <env name="BROADCAST_CONNECTION" value="null" force="true"/>
         <env name="CACHE_STORE" value="array" force="true"/>
-        <env name="DB_CONNECTION" value="sqlite" force="true"/>
-        <env name="DB_DATABASE" value=":memory:" force="true"/>
+        <env name="DB_CONNECTION" value="pgsql" force="true"/>
+        <env name="DB_HOST" value="127.0.0.1" force="true"/>
+        <env name="DB_PORT" value="5432" force="true"/>
+        <env name="DB_DATABASE" value="teal_test" force="true"/>
+        <env name="DB_USERNAME" value="teal" force="true"/>
+        <env name="DB_PASSWORD" value="password" force="true"/>
         <env name="MAIL_MAILER" value="array" force="true"/>
         <env name="QUEUE_CONNECTION" value="sync" force="true"/>
         <env name="SESSION_DRIVER" value="array" force="true"/>