Release 3.1.0

• update node (f1c5782)
• fix lint (980d09d)
• fix some bugs (5afda19)
• Fix fail base on output (cb96513)
• Update csproj (1e5e672)
• Try add env (92036aa)
• Update node version (0948006)
• Try add env (eef49c9)
• set diag level (96310dc)
• Upgrade to jhipster v7.1.0 (994e9d4)
• Update mysql to v5.0.1 (jhipster#784) (379a232)
• Fix compile error with Pomelo.EntityFrameworkCore.MySql v5.0.0 (jhipster#728) (63adac6)