message: add bundlephobia label
diff: <a href="https://codecov.io/gh/JoviDeCroock/preact-urql">
  <img alt="Test Coverage" src="https://codecov.io/gh/JoviDeCroock/preact-urql/branch/master/graph/badge.svg" />
  </a>
  - <a href="https://bundlephobia.com/result?p=urql">
  - <img alt="Minified gzip size" src="https://img.shields.io/bundlephobia/minzip/preact-urql.svg?label=gzip%20size" />
  + <a href="https://bundlephobia.com/result?p=@urql/preact">
  + <img alt="Minified gzip size" src="https://img.shields.io/bundlephobia/minzip/@urql/preact.svg?label=gzip%20size" />
  </a>
  <a href="https://spectrum.chat/urql">
  <img alt="Spectrum badge" src="https://withspectrum.github.io/badge/badge.svg" />
  