Added, updated and optimized memcached icons.

Author: canaleal

devicon.json

@@ -6533,10 +6533,18 @@
         ],
         "versions": {
             "svg": [
-                "original"
+                "original",
+                "original-wordmark",
+                "plain",
+                "plain-wordmark",
+                "line",
+                "line-wordmark"
             ],
             "font": [
-                "original"
+                "plain",
+                "plain-wordmark",
+                "line",
+                "line-wordmark"
             ]
         },
         "color": "#2A9790",