Merge pull request #78 from mislav/bump-xpath

Bump the xpath module

Bump golang.org/x/net from 0.7.0 to 0.33.0

update deps `github.com/antchfx/xpath` from v1.3.1 to v1.3.2

update package `github.com/antchfx/xpath` from v1.3.0 to v1.3.1

update `github.com/antchfx/xpath` from 1.2.3 to 1.3.0

add test case for concurrent query

update github.com/antchfx/xpath to v1.2.2

update github.com/antchfx/xpath to v1.2.1

Merge pull request #45 from megapctr/patch-1

Improve the documentation for `Query`

Drop go 1.7 and go 1.8, drop dep