Update to GLFW 3.3

go.mod

@@ -3,7 +3,7 @@ module github.com/g3n/engine
 go 1.13
 
 require (
-	github.com/go-gl/glfw v0.0.0-20190409004039-e6da0acd62b1
+	github.com/go-gl/glfw/v3.3/glfw v0.0.0-20200707082815-5321531c36a2
 	github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0
 	golang.org/x/image v0.0.0-20190910094157-69e4b8554b2a
 	gopkg.in/yaml.v2 v2.2.2

go.sum

@@ -1,5 +1,5 @@
-github.com/go-gl/glfw v0.0.0-20190409004039-e6da0acd62b1 h1:QbL/5oDUmRBzO9/Z7Seo6zf912W/a6Sr4Eu0G/3Jho0=
-github.com/go-gl/glfw v0.0.0-20190409004039-e6da0acd62b1/go.mod h1:vR7hzQXu2zJy9AVAgeJqvqgH9Q5CA+iKCZ2gyEVpxRU=
+github.com/go-gl/glfw/v3.3/glfw v0.0.0-20200707082815-5321531c36a2 h1:Ac1OEHHkbAZ6EUnJahF0GKcU0FjPc/V8F1DvjhKngFE=
+github.com/go-gl/glfw/v3.3/glfw v0.0.0-20200707082815-5321531c36a2/go.mod h1:tQ2UAYgL5IevRw8kRxooKSPJfGvJ9fJQFa0TUsXzTg8=
 github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0 h1:DACJavvAHhabrF08vX0COfcOBJRhZ8lUbR+ZWIs0Y5g=
 github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0/go.mod h1:E/TSTwGwJL78qG/PmXZO1EjYhfJinVAhrmmHX6Z8B9k=
 golang.org/x/image v0.0.0-20190910094157-69e4b8554b2a h1:gHevYm0pO4QUbwy8Dmdr01R5r1BuKtfYqRqF0h/Cbh0=

window/glfw.go

@@ -9,15 +9,15 @@ package window
 import (
 	"bytes"
 	"fmt"
-	"github.com/g3n/engine/gui/assets"
+	"image"
+	_ "image/png"
+	"os"
 	"runtime"
 
 	"github.com/g3n/engine/core"
 	"github.com/g3n/engine/gls"
-	"github.com/go-gl/glfw/v3.2/glfw"
-	"image"
-	_ "image/png"
-	"os"
+	"github.com/g3n/engine/gui/assets"
+	"github.com/go-gl/glfw/v3.3/glfw"
 )
 
 // Keycodes