CHANGELOG.md in grape-1.3.0 vs CHANGELOG.md in grape-1.3.1

- old
+ new
@@ -1,4 +1,26 @@
+### 1.3.1 (2020/03/11)
+
+#### Features
+
+* [#2005](https://github.com/ruby-grape/grape/pull/2005): Content types registrable - [@ericproulx](https://github.com/ericproulx).
+* [#2003](https://github.com/ruby-grape/grape/pull/2003): Upgraded Rubocop to 0.80.1 - [@ericproulx](https://github.com/ericproulx).
+* [#2002](https://github.com/ruby-grape/grape/pull/2002): Objects allocation optimization (lazy_lookup) - [@ericproulx](https://github.com/ericproulx).
+
+#### Fixes
+
+* [#2006](https://github.com/ruby-grape/grape/pull/2006): Fix explicit rescue StandardError - [@ericproulx](https://github.com/ericproulx).
+* [#2004](https://github.com/ruby-grape/grape/pull/2004): Rubocop fixes - [@ericproulx](https://github.com/ericproulx).
+* [#1995](https://github.com/ruby-grape/grape/pull/1995): Fix: "undefined instance variables" and "method redefined" warnings - [@nbeyer](https://github.com/nbeyer).
+* [#1994](https://github.com/ruby-grape/grape/pull/1993): Fix typos in README - [@bellmyer](https://github.com/bellmyer).
+* [#1993](https://github.com/ruby-grape/grape/pull/1993): Lazy join allow header - [@ericproulx](https://github.com/ericproulx).
+* [#1987](https://github.com/ruby-grape/grape/pull/1987): Re-add exactly_one_of mutually exclusive error message - [@ZeroInputCtrl](https://github.com/ZeroInputCtrl).
+* [#1977](https://github.com/ruby-grape/grape/pull/1977): Skip validation for a file if it is optional and nil - [@dnesteryuk](https://github.com/dnesteryuk).
+* [#1976](https://github.com/ruby-grape/grape/pull/1976): Ensure classes/modules listed for autoload really exist - [@dnesteryuk](https://github.com/dnesteryuk).
+* [#1971](https://github.com/ruby-grape/grape/pull/1971): Fix BigDecimal coercion - [@FlickStuart](https://github.com/FlickStuart).
+* [#1968](https://github.com/ruby-grape/grape/pull/1968): Fix args forwarding in Grape::Middleware::Stack#merge_with for ruby 2.7.0 - [@dm1try](https://github.com/dm1try).
+* [#1988](https://github.com/ruby-grape/grape/pull/1988): Refactored the full_messages method and stop overriding full_message - [@hosseintoussi](https://github.com/hosseintoussi).
+
 ### 1.3.0 (2020/01/11)
 
 #### Features
 
 * [#1949](https://github.com/ruby-grape/grape/pull/1949): Add support for Ruby 2.7 - [@nbulaj](https://github.com/nbulaj).