enable Lint/UriEscapeUnescape

[lamont-granquist]

required for ruby 2.7

https://docs.knapsackpro.com/2020/uri-escape-is-obsolete-percent-encoding-your-query-string

[lamont-granquist]

NOTES:

• None of the APIs are backwards compatible with URI.escape/unescape.

• Different components need different kinds of normalization, URI.escape/unescape was safe to rip over the whole URI but it would miss some RFC violating edge conditions (which if they didn't ever come up weren't actually hurting anything, but the change is FORCING us to care about those edge conditions).

• CGI.escape/unescape can be used for individual components

• Addressable::URI.parse(uri_string).normalize.to_s is the best replacement solution for entire uris.