Upgrade eslint ECMA version to 2022

[ptpaterson]

Problem

eslint language version is set to ECMA 2020, which means we cannot use some newer features, such as private fields starting with #.

Solution

Set the language version to ECMA 2022.

Bonus: run npm audit fix

Result

We can use new ECMA features. Node 18 and browsers are still well-supported.

• https://node.green/
• https://caniuse.com/?feats=mdn-javascript_builtins_array_at,mdn-javascript_builtins_regexp_hasindices,mdn-javascript_builtins_object_hasown,mdn-javascript_builtins_error_cause,mdn-javascript_operators_await_top_level,mdn-javascript_classes_private_class_fields,mdn-javascript_classes_private_class_methods,mdn-javascript_classes_static_class_fields,mdn-javascript_classes_static_initialization_blocks