* Add a simple 'skip' filter
This filter simply skips the first `send_first_at` values, then passes
everything as-is. This is quite useful when you know the first few sensor
readings should be ignored.
Example YAML:
```yaml
sensor:
- platform: sgp30
id: mysensor_sgp30
eco2:
id: mysensor_sgp30_co2
name: "eCO₂"
accuracy_decimals: 0
filters:
- skip:
send_first_at: 41
```
* Rename the filter to `skip_initial` and simplify the schema
New usage:
```yaml
filters:
- skip_initial: 41
```
* Apply clang-format
Sybren A. Stüvel
48658d5a55