feat: Make it possible to construct request options with few parameters

(cherry picked from commit aa137398aa9267410e2374d272fda0db2066bc6e)

Author: popstarfreas

src/Http.res

@@ -708,6 +708,7 @@ external requestOptions: (
   ~setHost: bool=?,
   ~socketPath: string=?,
   ~timeout: int=?,
+  unit,
 ) => requestOptions = ""
 
 @module("http") external request: string => ClientRequest.t = "request"