Finish tests

- Add sub-doc handling for SQLite fields
- Add casting for PostgreSQL BT on numeric value
- Add hasItems() to DocumentList
- Fix SQL syntax problems exposed by tests

tests/unit/Query/FindTest.php

@@ -2,7 +2,7 @@
 
 namespace Test\Unit\Query;
 
-use BitBadger\PDODocument\Field;
+use BitBadger\PDODocument\{Configuration, Field, Mode};
 use BitBadger\PDODocument\Query\Find;
 use PHPUnit\Framework\Attributes\TestDox;
 use PHPUnit\Framework\TestCase;
@@ -12,6 +12,16 @@ use PHPUnit\Framework\TestCase;
  */
 class FindTest extends TestCase
 {
+    protected function setUp(): void
+    {
+        Configuration::$mode = Mode::SQLite;
+    }
+
+    protected function tearDown(): void
+    {
+        Configuration::$mode = null;
+    }
+
     #[TestDox('By ID succeeds')]
     public function testByIdSucceeds(): void
     {