Update changelog and readme

Author: aarondl

CHANGELOG.md

@@ -3,6 +3,24 @@
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
+## [v8.1.2]
+
+### Fixed
+
+- Scan negative int64 values into uint64 without breaking
+
+## [v8.1.1]
+
+### Fixed
+
+- Fix an overflow issue in uint64
+
+## [v8.1.0]
+
+### Changed
+
+- Version the code with go modules
+
 ## [v8.0.0]
 
 ### Changed

README.md

@@ -20,7 +20,7 @@ please stop using gopkg.in and ensure you're using `vgo`, `dep` or vendoring to
 version null.
 
 ```
-go get -u "github.com/volatiletech/null"
+go get github.com/volatiletech/null/v8
 ```
 
 ### Usage
@@ -58,4 +58,4 @@ eventually](https://github.com/golang/go/issues/4357).
 
 ### License
 
-BSD
+BSD-3 (See License file)