Use WorldRenderEvents if available (#680)

* Use WorldRenderEvents if available

Fixes an issue when Canvas is installed

* Improve code

* Depend only on fabric-rendering-v1

* Use fabricApi.module

build.gradle

@@ -21,7 +21,7 @@ dependencies {
 	modCompile "net.fabricmc:fabric-loader:${project.loader_version}"
 
 	// Fabric API. This is technically optional, but you probably want it anyway.
-	// modCompile "net.fabricmc:fabric:${project.fabric_version}"
+	modCompileOnly fabricApi.module("fabric-rendering-v1", project.fabric_version)
 
 	// PSA: Some older mods, compiled on Loom 0.2.1, might have outdated Maven POMs.
 	// You may need to force-disable transitiveness on them.