message: Fix precision setting change not being picked up
diff: import { GLShader } from 'pixi-gl-core';
  import settings from './settings';
  -const { PRECISION } = settings;
  -
  function checkPrecision(src)
  {
  if (src instanceof Array)
  @@ -11,14 +9,14 @@ function checkPrecision(src)
  {
  const copy = src.slice(0);
  - copy.unshift(`precision ${PRECISION} float;`);
  + copy.unshift(`precision ${settings.PRECISION} float;`);
  return copy;
  }
  }
  else if (src.substring(0, 9) !== 'precision')
  {
  - return `precision ${PRECISION} float;\n${src}`;
  + return `precision ${settings.PRECISION} float;\n${src}`;
  }
  return src;
  