WIP: update changelog & readme

Author: aharpervc

CHANGELOG.md

@@ -1,3 +1,10 @@
+## (unreleased)
+
+* Removed old/unused appveyor config
+* Remove old Rubies from CI & cross build config
+* Add Ruby 2.7 to CI & cross build config
+* Use rake-compiler-dock 1.0 for Ruby 2.7 support
+
 ## 2.1.2
 
 * Use Kernel.BigDecimal vs BigDecimal.new. Fixes #409.

README.md

@@ -401,7 +401,7 @@ The default is true and since FreeTDS v1.0 would do this as well.
 
 ## Compiling Gems for Windows
 
-For the convenience of Windows users, TinyTDS ships pre-compiled gems for Ruby 2.0, 2.1, 2.2, and 2.3 on Windows. In order to generate these gems, [rake-compiler-dock](https://github.com/rake-compiler/rake-compiler-dock) is used. This project provides a [Docker image](https://registry.hub.docker.com/u/larskanis/rake-compiler-dock/) with rvm, cross-compilers and a number of different target versions of Ruby.
+For the convenience of Windows users, TinyTDS ships pre-compiled gems for supported versions of Ruby on Windows. In order to generate these gems, [rake-compiler-dock](https://github.com/rake-compiler/rake-compiler-dock) is used. This project provides a [Docker image](https://registry.hub.docker.com/u/larskanis/rake-compiler-dock/) with rvm, cross-compilers and a number of different target versions of Ruby.
 
 Run the following rake task to compile the gems for Windows. This will check the availability of [Docker](https://www.docker.com/) (and boot2docker on Windows or OS-X) and will give some advice for download and installation. When docker is running, it will download the docker image (once-only) and start the build: