Improvements to JavaScript analysis

General improvements

Support for the following frameworks and libraries has been improved:
- react
- Handlebars

Query	Tags	Purpose

Query	Expected impact	Change
Clear-text logging of sensitive information (`js/clear-text-logging`)	More results	More results involving `process.env` and indirect calls to logging methods are recognized.
Incomplete string escaping or encoding (`js/incomplete-sanitization`)	Fewer false positive results	This query now recognizes additional cases where a single replacement is likely to be intentional.
Unbound event handler receiver (`js/unbound-event-handler-receiver`)	Fewer false positive results	This query now recognizes additional ways event handler receivers can be bound.