Rails 7.0 support

[yahonda]

Rails 7.0.0 has been released on Dec 15, 2020 https://rubyonrails.org/2021/12/15/Rails-7-fulfilling-a-vision , Active Record TiDB adapter needs to release activerecord-tidb-adapter 7.0.0.

Tasks needed

• Create 7-0-stable from the latest master branch

• Update Gemfile and other information to support Rails 7.0.0 or higher at 7-0-stable branch
  

  activerecord-tidb-adapter/activerecord-tidb-adapter.gemspec

  Line 32 in deca938

  spec.add_dependency 'activerecord', '~> 7.0.0.alpha'

  via Support Rails 7.0.0 #34

• Update Gemfile at the new master branch to support Rails 7.1.0.alpha
  via Initial step to support Rails 7.0.z #36

• Rails 7.0.1 or higher is required Active Record 7.0.1 or higher is required #45

[yahonda]

@hooopo Would you take care of Create 7-0-stable from the latest master branch? because my account does not have privileges to push a new branch at https://github.com/pingcap/activerecord-tidb-adapter . Once the 7-0-stable branch has been made I can open some pull requests.

[hooopo]

@hooopo Would you take care of Create 7-0-stable from the latest master branch? because my account does not have privileges to push a new branch at https://github.com/pingcap/activerecord-tidb-adapter . Once the 7-0-stable branch has been made I can open some pull requests.

done

[yahonda]

Changed the subject name to Rails 7.0 support because it requires Rails 7.0.1. refer to #45 for the background.

[yahonda]

@hooopo Would you release activerecord-tidb-adapter 7.0.0 from the 7-0-stable branch and push it to the https://rubygems.org/gems/activerecord-tidb-adapter ?

[hooopo]

@yahonda released

[yahonda]

Thanks!

[yahonda]

Just updated release section for v7.0.0

https://github.com/pingcap/activerecord-tidb-adapter/releases/tag/v7.0.0