add 'try...catch' statement snippet to js-mode (#227)
add 'try...catch' statement snippet to js-mode (#227)

* add 'try...catch' statement snippet to js-mode

For details, see below link:

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/try...catch

* change variable name from `e` to `err` for Error object

ageekymonk/yasnippet-snippets,ageekymonk/yasnippet-snippets,ageekymonk/yasnippet-snippets