memcache - removing @types/keyv (#793)

Author: jaredwray

packages/memcache/package.json

@@ -72,7 +72,6 @@
 	},
 	"devDependencies": {
 		"@keyv/test-suite": "*",
-		"@types/keyv": "^3.1.4",
 		"@types/memjs": "^1.3.0",
 		"keyv": "*",
 		"requirable": "^1.0.5",