Change support to Go 13+

go.mod

@@ -1,6 +1,6 @@
 module github.com/g3n/engine
 
-go 1.12
+go 1.13
 
 require (
 	github.com/go-gl/glfw v0.0.0-20190409004039-e6da0acd62b1

util/wasm/wasm112.go

@@ -1,16 +0,0 @@
-// +build !go1.13
-
-package wasm
-
-import (
-	"syscall/js"
-)
-
-func SliceToTypedArray(s interface{}) (val js.Value, free func()) {
-	dataTA := js.TypedArrayOf(s)
-	return dataTA.Value, func(){dataTA.Release()}
-}
-
-func Equal(a, b js.Value) bool {
-	return a == b
-}