Fix chronicles compilation issue. (#6)

Export address variable.

presto/client.nim

@@ -8,7 +8,7 @@
 #              MIT license (LICENSE-MIT)
 import std/[macros, options, uri, sequtils]
 import chronos, chronos/apps/http/[httpcommon, httptable, httpclient]
-import chronicles
+import chronicles except error
 import httputils, stew/base10
 import segpath, common, macrocommon, agent
 export httpclient, httptable, httpcommon, options, agent, httputils
@@ -19,9 +19,11 @@ template meth*(v: HttpMethod) {.pragma.}
 type
   RestClient* = object of RootObj
     session: HttpSessionRef
-    address: HttpAddress
+    address*: HttpAddress
     agent: string
 
+  RestClientRef* = ref RestClient
+
   RestPlainResponse* = object
     status*: int
     contentType*: string
@@ -40,8 +42,6 @@ type
   RestReturnKind {.pure.} = enum
     Status, PlainResponse, GenericResponse, Value
 
-  RestClientRef* = ref RestClient
-
   RestDefect* = object of Defect
   RestError* = object of CatchableError
   RestEncodingError* = object of RestError