Make release 2.0.3

[Slach]

2.0.3 (2020-07-24)

Enhancements:

• add setup notes for Grafana 7.x to README
• add SQL preprocessing logic on browser side with <% js code subset %>, Feature/sql logic #186, thanks @fgbogdan
• improve alerts query processing for use case when query(query_name, from, to) time range is less than visible dashboard time range, see Additional time range for alerts doesn't work #237
• improve alerts json parsing in golang part for case when we have string fields in response which interprets as series name, see Problem with alerts with multiple lines (group by) #230
• properly parsing POST queries in golang part of plugin, using the switch of the GET/POST method from the driver settings #228, thanks @it1804

Fixes:

• add Vagrantfile for statefull environment and allow to upgrade scenario like grafana 7.1.0 + grafana-cli upgrade-all
  • fix grafana-cli plugins can't update to 2.0.2 #244
  • fix Plugin cannot be loaded since version 2.*  #243
• add multiple dashboard examples for github issues:
  • fix Integer or String? #240
  • fix $__from and $__to changing the rawQuery value in the dashboard and triggering save prompt. #135
  • fix Can't use $unescape($column) in SELECT request when $column is multiple-value variable #245
  • fix Macros $interval not correct parse #238
  • fix Template variable dependant of another template variable with "Include All option" on, causes Cannot read property 'replace' of null #232
  • fix Graph message: "No data points" with subquery #127
  • fix Use variable as value for database or table in Query Editor #141