v1.2.18-pre - JWT login + two letter cultures + nuget packages upgrade

What's Changed

• Do not filter the plugin's entities by @AlexInSriLanka in #234
• Login with user name and password. by @SerEgoroff in #233
• Tests use real authentication by @SerEgoroff in #237
• Login improvement after review. by @SerEgoroff in #238
• JWT login + two letter culture support by @peterliapin in #239
• Version 1.2.18-pre - nuget packages upgrade by @peterliapin in #240

Full Changelog: v1.2.16-pre...v1.2.18-pre