Change version, download and manifest to Foundry invalid values for testing.

Provide example of relationships.requires for other modules to use.

README.md

@@ -176,3 +176,19 @@ Executes a function on the clients of a specified list of players. The function
 - **parameters...** the parameters that should be passed to the called function. Pass the parameters in comma separated, as you would do for a regular function call.
 
 **Return value**: The promise returned by this function will resolve as soon as the request for execution has been sent to the specified clients and *will not* wait until those clients have finished processing that function. The promise will not yield any return value.
+
+## Your Module Manifest
+
+Socketlib can be set to be required by your module by including the following in your manifest:
+
+```json
+"relationships": {
+  "requires": [
+    {
+      "id": "socketlib",
+      "type": "module",
+      "manifest": "https://github.com/farling42/foundryvtt-socketlib/releases/latest/download/module.json"
+    }
+  ]
+}
+```

module.json

@@ -2,7 +2,7 @@
 	"id": "socketlib",
 	"title": "socketlib",
 	"description": "A library for easier handling of foundry sockets",
-	"version": "1.1.1",
+	"version": "#{VERSION}#",
 	"compatibility": {
 		"minimum": "11",
 		"verified": "13.338"
@@ -28,8 +28,8 @@
 		"src/socketlib.js"
 	],
 	"url": "https://github.com/farling42/foundryvtt-socketlib",
-	"download": "https://github.com/farling42/foundryvtt-socketlib/releases/download/v1.1.1/module.zip",
+	"download": "#{URL}#",
-	"manifest": "https://github.com/farling42/foundryvtt-socketlib/releases/latest/download/module.json",
+	"manifest": "#{MANIFEST}#",
 	"readme": "https://github.com/farling42/foundryvtt-socketlib/blob/master/README.md",
 	"changelog": "https://github.com/farling42/foundryvtt-socketlib/blob/master/CHANGELOG.md",
 	"bugs": "https://github.com/farling42/foundryvtt-socketlib/issues"