Build tools update - #9062

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5, actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

src/io/csv.js:236:36: Unnecessary escape character '*'

src/io/csv.js:236:33: Unnecessary escape character '('

src/io/csv.js:236:30: Unnecessary escape character '{'

src/io/csv.js:236:25: Unnecessary escape character '['

test/unit/webgl/p5.Texture.js:271:11: Variable 'tex2' is declared but never used.

test/unit/webgl/p5.Texture.js:270:11: Variable 'tex1' is declared but never used.

test/unit/webgl/p5.Texture.js:246:11: Variable 'tex2' is declared but never used.

test/unit/webgl/p5.Texture.js:245:11: Variable 'tex1' is declared but never used.

test/unit/webgl/p5.Texture.js:221:11: Variable 'tex2' is declared but never used.