Fix: update exports.version to current version (#1534)

* Change exports.version in lib/chai to 4.3.7

* Update lib/chai/exports.version to 4.3.8

Author: peanutenthusiast

lib/chai.js

@@ -10,7 +10,7 @@ var used = [];
  * Chai version
  */
 
-exports.version = '4.3.3';
+exports.version = '4.3.8';
 
 /*!
  * Assertion Error