Fix before/after test hooks.

Author: ioquatix

fixtures/client_context.rb

@@ -20,14 +20,12 @@
 
 	let(:root) {Async::Redis::Key["async-redis:test:#{SecureRandom.uuid}"]}
 
-	def before
-		super
+	before do
 		keys = client.keys("#{root}:*")
 		client.del(*keys) if keys.any?
 	end
 
-	def after
+	after do
 		@client&.close
-		super
 	end
 end