Log Message:
Update to base-unicode-symbols-0.2.4.2

0.2.4.2
* infixl 6 for MINUS SIGN

0.2.4.1
* infixl 7 for MULTIPLICATION SIGN

0.2.4
* Added MULTIPLICATION SIGN
* Added this changelog
* Fixed UnicodeSyntax extension URL in readme
* Updated copyright years
* Updated author email

0.2.3
* Added DOUBLE EXCLAMATION MARK
* Added GREEK SMALL LETTER EPSILON
* Added DOUBLE-STRUCK CAPITAL N
* Added XOR
* Added NAND
* Added NOR
* Added DIVIDES
* Added DOES NOT DIVIDE
* Added MINUS SIGN
* Added RIGHTWARDS ARROW WITH TAIL
* Added LEFTWARDS ARROW WITH TAIL
* Updated readme
* Updated copyright years
* Added minimal travis YAML file
* Added cabal flag for base >= 4.8.0.0 support (enabled by default)
* Removed module haddocks