Fix compilation.

Author: arturaz

modules/core/src/main/scala/dev/profunktor/redis4cats/effect/MkRedis.scala

@@ -17,7 +17,6 @@
 package dev.profunktor.redis4cats.effect
 
 import scala.annotation.implicitNotFound
-import scala.annotation.nowarn
 
 import cats.effect.kernel._
 import dev.profunktor.redis4cats.connection.{ RedisClient, RedisClusterClient, RedisURI }
@@ -58,9 +57,10 @@ sealed trait MkRedis[F[_]] {
 object MkRedis {
   def apply[F[_]: MkRedis]: MkRedis[F] = implicitly
 
-  @nowarn
   implicit def forAsync[F[_]: Async: Log]: MkRedis[F] =
     new MkRedis[F] {
+      private implicit val implicitThis: MkRedis[F] = this
+
       def clientFrom(strUri: => String): Resource[F, RedisClient] =
         RedisClient[F].from(strUri)