Move to SQLite (#13)

youmubot-db-sql/migrations/20210329111010_osu_users.sql

@@ -0,0 +1,12 @@
+-- Add migration script here
+
+CREATE TABLE osu_users (
+    user_id     BIGINT   NOT NULL PRIMARY KEY,
+    id          BIGINT   NOT NULL UNIQUE,
+    last_update DATETIME NOT NULL,
+    pp_std      REAL     NULL,
+    pp_taiko    REAL     NULL,
+    pp_mania    REAL     NULL,
+    pp_catch    REAL     NULL,
+    failures    INT      NOT NULL DEFAULT 0
+);