update changelog

Author: duaraghav8

CHANGELOG.md

@@ -4,6 +4,7 @@
 - Added support for `solium-disable-previous-line` comment directive.
 - Added support for `solium-enable` comment directive. See [configuring with comments](https://ethlint.readthedocs.io/en/latest/user-guide.html#configuring-with-comments). This feature currently has a limitation which has been documented in [Known Issues](https://ethlint.readthedocs.io/en/latest/known-issues.html).
 - Fixed rule `no-empty-blocks` to report function declarations with empty bodies. Fallback and `payable` functions and `payable` constructors are not reported if their body is empty. See [#254](https://github.com/duaraghav8/Ethlint/issues/254).
+- Fixed rule `quotes` to stop reporting false positives due to brackets enclosing strings (see [#240](https://github.com/duaraghav8/Ethlint/issues/240)).
 - Modified rule `uppercase` to allow up to 2 leading and trailing underscores for a constant's name.
 
 ## 1.2.2 (2019-01-13)

README.md

@@ -10,6 +10,7 @@
 Ethlint (Formerly Solium) analyzes your Solidity code for style & security issues and fixes them.
 
 See [Documentation](https://ethlint.readthedocs.io/), [Changelog](./CHANGELOG.md) and [upcoming releases](https://github.com/duaraghav8/Ethlint/projects).
+Before beginning to work on a contribution, please read the [Guidelines](./CONTRIBUTING.md).
 
 ## Install
 ```bash