Update Loom version and reconfigure run locations

build.gradle

@@ -1,5 +1,5 @@
 plugins {
-    id 'fabric-loom' version '1.2-SNAPSHOT'
+    id 'fabric-loom' version '1.7-SNAPSHOT'
     id 'maven-publish'
 }
 
@@ -76,3 +76,19 @@ publishing {
         // retrieving dependencies.
     }
 }
+
+loom {
+    runs {
+        client {
+            client()
+
+            runDir = "run/client"
+        }
+
+        server {
+            server()
+
+            runDir = "run/server"
+        }
+    }
+}