Description:

Changes:

• increased the maximum AribtraryPolygon vertices value to 32
• removed the public API variable canvas.ArbitraryPolygonVerticesMaximum (it is only needed internally)
• gl_core, gl_es, gl_gomobile, and gl_wasm previously included identical parameters for each shader, which were initialized during setup and remained immutable. I have removed these fixed parameters, allowing SetUniform* functions to create uniforms dynamically on the first call and cache them. Consequently, there is no longer a need to maintain lists of shader attributes, as the cache is automatically initialized by draw* functions during first object creation
• added Uniform2fv function along with cache
• decreased edge softness value (edges looked a bit blurry, especially for web)

Checklist:

• Tests included.
• Lint and formatter run with no errors.
• Tests all pass.