Many fixes to upgrade Eslint from 9.x to 10.x

Author: Gonzalo Diaz

.github/workflows/node.js.yml

@@ -16,7 +16,7 @@ jobs:
     strategy:
       matrix:
         os: ["ubuntu-24.04", "macos-14", "windows-2022"]
-        node-version: [18.x, 20.x, 22.x]
+        node-version: [22.x, 24.x, 26.x]
         # See supported Node.js release schedule
         # at https://nodejs.org/en/about/releases/
 

Makefile

@@ -95,7 +95,7 @@ coverage: test
 
 coverage/html: coverage
 	@if [ "$$(uname)" = "Darwin" ]; then \
-		open ./coverage/lcov-report/index.htmll; \
+		open ./coverage/lcov-report/index.html; \
 	elif [ "$$(uname | tr '[:upper:]' '[:lower:]')" = "mingw32" ] || [ "$$(uname | tr '[:upper:]' '[:lower:]')" = "mingw64" ] || [ "$$(uname | tr '[:upper:]' '[:lower:]')" = "cygwin" ]; then \
 		cmd /c start ./coverage/lcov-report/index.htmll; \
 	else \