Updated web database implementation to match native implementation for get/getOptional. Using getAll for refreshSchema

Author: Chriztiaan

packages/sqlite_async/lib/src/sqlite_queries.dart

@@ -140,6 +140,6 @@ mixin SqliteQueries implements SqliteWriteContext, SqliteConnection {
 
   @override
   Future<void> refreshSchema() {
-    return get("PRAGMA table_info('sqlite_master')");
+    return getAll("PRAGMA table_info('sqlite_master')");
   }
 }

packages/sqlite_async/lib/src/web/database.dart

@@ -150,7 +150,7 @@ class _SharedContext implements SqliteReadContext {
   @override
   Future<Row> get(String sql, [List<Object?> parameters = const []]) async {
     final results = await getAll(sql, parameters);
-    return results.single;
+    return results.first;
   }
 
   @override
@@ -169,7 +169,7 @@ class _SharedContext implements SqliteReadContext {
   Future<Row?> getOptional(String sql,
       [List<Object?> parameters = const []]) async {
     final results = await getAll(sql, parameters);
-    return results.singleOrNull;
+    return results.firstOrNull;
   }
 
   void markClosed() {