update changelog

update CHANGELOG

update CHANGELOG

update all error messages

Merge pull request huandu#149 from huandu/feature-make-params-using-f…

…ield-tag

Fix huandu#147 $148 MakeParams uses struct field tag.

add /v2 in go.mod. this is a necessary breaking change if one wants t…

…o use `go mod`.

update changelog

remove access token in test

Merge pull request huandu#115 from huandu/bug-114-query-string-in-path

Fix huandu#114. support query string in path

update readme