fix(deps): update github.com/go-gl/gl commit hash to 640c646 (#574)

Co-authored-by: Renovate Bot <[email protected]>

Author: renovate[bot]

go.mod

@@ -5,7 +5,7 @@ go 1.12
 require (
 	github.com/Xuanwo/go-locale v1.0.0
 	github.com/davecgh/go-spew v1.1.1
-	github.com/go-gl/gl v0.0.0-20190320180904-bf2b1f2f34d7
+	github.com/go-gl/gl v0.0.0-20210308051507-640c6464cf3e
 	github.com/go-gl/glfw/v3.3/glfw v0.0.0-20210307203918-211ecac01a39
 	github.com/pkg/errors v0.9.1
 	github.com/stretchr/testify v1.7.0

go.sum

@@ -9,6 +9,8 @@ github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/go-gl/gl v0.0.0-20190320180904-bf2b1f2f34d7 h1:SCYMcCJ89LjRGwEa0tRluNRiMjZHalQZrVrvTbPh+qw=
 github.com/go-gl/gl v0.0.0-20190320180904-bf2b1f2f34d7/go.mod h1:482civXOzJJCPzJ4ZOX/pwvXBWSnzD4OKMdH4ClKGbk=
+github.com/go-gl/gl v0.0.0-20210308051507-640c6464cf3e h1:hlGZ9V6EvtJe3XeitWx7ZWYu85fPn9lYBNtwY6MCvhc=
+github.com/go-gl/gl v0.0.0-20210308051507-640c6464cf3e/go.mod h1:482civXOzJJCPzJ4ZOX/pwvXBWSnzD4OKMdH4ClKGbk=
 github.com/go-gl/glfw/v3.3/glfw v0.0.0-20200420212212-258d9bec320e h1:8ywu4ELC/6owgOZlZx75CyYS5AYwUT2L+hzPModKvag=
 github.com/go-gl/glfw/v3.3/glfw v0.0.0-20200420212212-258d9bec320e/go.mod h1:tQ2UAYgL5IevRw8kRxooKSPJfGvJ9fJQFa0TUsXzTg8=
 github.com/go-gl/glfw/v3.3/glfw v0.0.0-20200625191551-73d3c3675aa3 h1:q521PfSp5/z6/sD9FZZOWj4d1MLmfQW8PkRnI9M6PCE=