Use datetime as column type for "entry_date" in database

Author: eht16

logstash_async/database.py

@@ -18,7 +18,7 @@
     `event_id`          INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT,
     `event_text`        TEXT NOT NULL,
     `pending_delete`    INTEGER NOT NULL,
-    `entry_date`        TEXT NOT NULL);
+    `entry_date`        DATETIME NOT NULL);
     ''',
     '''CREATE INDEX IF NOT EXISTS `idx_pending_delete` ON `event` (pending_delete);''',
     '''CREATE INDEX IF NOT EXISTS `idx_entry_date` ON `event` (entry_date);''',