Ensure plus character in query parameter is percent encoded

[weilikuo]

Manually encodes the query parameter name and value to ensure the "+" character is percent encoded

Example result captured in Proxy (= now properly encoded to %2B)

https://[Server]/members/api/feed/?filter=authors.id:6647aacb406f410001ac6a9f%2Btype:post  [...]

[zac]

@weilikuo Is there any way to opt into this encoding? I hate to complicate this too much, but having some kind of queryEncodingStrategy which we could set to .custom or something?

[zac]

@weilikuo Here's my thinking on how to make this opt-in: #18. Happy to get feedback though if this works for our use-case!