HardwareSerial::write(long/int) is incorrect/dangerous!

any value above 255 will just be cut off -

```
inline size_t write(unsigned long n) { return write((uint8_t)n); }
inline size_t write(long n) { return write((uint8_t)n); }
inline size_t write(unsigned int n) { return write((uint8_t)n); }
inline size_t write(int n) { return write((uint8_t)n); }
```

please remove or fix the incorrect implementations!