V1.4.0
Full Changelog: V1.3.0...v1.4.0
V1.3.1 is only a fix for v1.3.0. This closes #1 and #2.
With V1.4.0, the parser is changed with node-html-parser.
And now, the search options is giving via options object.
Added useragent changing support.
Code is optimized. With old code, it was taking 1.5 - 2 seconds on my computer, but with new update, it taking 1 - 1.5 seconds now.