Make context protected

This is necessary for future extension of the project by subclassing its components.

Unfortunately, current implementation doesn't provide any elegant way to add axis, legend nor labels to the plot.

Author: zoonman

src/webglplot.ts

@@ -30,9 +30,9 @@ type WebglPlotConfig = {
  */
 export class WebglPlot {
   /**
-   * @private
+   * @protected
    */
-  private readonly webgl: WebGLRenderingContext;
+  protected readonly webgl: WebGLRenderingContext;
 
   /**
    * Global horizontal scale factor