nvg 0.5.11

# Pure-rust implementation of NanoVG

## Demo

### Clock

```
cargo run -p nvg-gl --example demo-clock
```

![demo-clock](screenshots/clock.png)

### Cutout

```
cargo run -p nvg-gl --example demo-cutout
```

![demo-clock](screenshots/cutout.png)

### Draw

```
cargo run -p nvg-gl --example demo-draw
```

![demo-clock](screenshots/draw.png)