message: add willReadFrequently option to sdf text 2d context
diff: /**
  - * Copyright (c) 2019 mol* contributors, licensed under MIT, See LICENSE file for more info.
  + * Copyright (c) 2019-2022 mol* contributors, licensed under MIT, See LICENSE file for more info.
  *
  * @author Alexander Rose <alexander.rose@weirdbyte.de>
  */
  @@ -88,7 +88,7 @@ export class FontAtlas {
  this.scratchCanvas.width = this.maxWidth;
  this.scratchCanvas.height = this.lineHeight;
  - this.scratchContext = this.scratchCanvas.getContext('2d')!;
  + this.scratchContext = this.scratchCanvas.getContext('2d', { willReadFrequently: true })!;
  this.scratchContext.font = `${p.fontStyle} ${p.fontVariant} ${p.fontWeight} ${fontSize}px ${p.fontFamily}`;
  this.scratchContext.fillStyle = 'black';
  this.scratchContext.textBaseline = 'middle';
  