Use decimals for float type

Author: lulunac27a

schema.sql

@@ -2,8 +2,8 @@ create table
     if not exists user (
         id integer primary key autoincrement, --user id
         username text not null unique, --username
-        xp float default 0, --current user XP
-        xp_required float default 1, --user required XP to reach the next level
-        total_xp float default 0, --user total XP earned
+        xp float default 0.0, --current user XP
+        xp_required float default 1.0, --user required XP to reach the next level
+        total_xp float default 0.0, --user total XP earned
         level integer default 1 --current user level
     );