Testing WebGL with some CI

I find that puppeter in headless mode not support this list of extension:
```
WebGL:
EXT_disjoint_timer_query
EXT_frag_depth
EXT_shader_texture_lod
EXT_sRGB
WEBGL_compressed_texture_s3tc_srgb

WebGL2:
EXT_disjoint_timer_query_webgl2
WEBGL_compressed_texture_s3tc_srgb
```
Can I use `node-gles` for testing webgl code with some CI? As I understand your package supported some of them.