fix: properly quote table names with schema definition (#84)

Author: sabee-bb

composer.json

@@ -22,6 +22,7 @@
         "codeception/codeception": "*@dev"
     },
     "require-dev": {
+        "behat/gherkin": "~4.10.0",
         "squizlabs/php_codesniffer": "*"
     },
     "conflict": {

src/Codeception/Lib/Driver/PostgreSql.php

@@ -164,7 +164,7 @@ public function getPrimaryKey(string $tableName): array
                 FROM   pg_index i
                 JOIN   pg_attribute a ON a.attrelid = i.indrelid
                                      AND a.attnum = ANY(i.indkey)
-                WHERE  i.indrelid = '\"{$tableName}\"'::regclass
+                WHERE  i.indrelid = " . $this->getQuotedName($tableName) . "::regclass
                 AND    i.indisprimary";
             $stmt = $this->executeQuery($query, []);
             $columns = $stmt->fetchAll(PDO::FETCH_ASSOC);