Update changelog

Author: krvajal

CHANGELOG.md

@@ -4,4 +4,8 @@ All notable changes to the "fortran-linter" extension will be documented in this
 Check [Keep a Changelog](http://keepachangelog.com/) for recommendations on how to structure this file.
 
 ## [Unreleased]
-- Initial release
+- Initial release
+
+## [0.4.0] - 2017-05-29
+### Added 
+- Show docs for intrinsic functions on hover

syntaxes/fortran90.tmLanguage

@@ -316,7 +316,7 @@
 			<key>comment</key>
 			<string>numeric instrinsics</string>
 			<key>match</key>
-			<string>\b(?i:(ceiling|floor|modulo)(?=\())</string>
+			<string>\b(?i:(ceiling|floor|modulo|abs|sin)(?=\())</string>
 			<key>name</key>
 			<string>keyword.other.instrinsic.numeric.fortran.modern</string>
 		</dict>