No-brainer Heroes update for 20 December 2019

"1. Increase Japanese language support;
2. Added new level experience books and adjusted the effect of experience books;
3. <Thor>, <Monica> Added passive skills:""Backup guide"",""Backup guide +"";
4. Optimize the display of English text;
5. Fix bug: the skill ""Cleanse"" cannot be used;
6.Fix bug: Some player's Bulletin board missions refresh is abnormal;
7.Fix bug: Some drugs sold at merchant have the wrong price;
8. Fix bug: Do not show buff ""frost"";