fix: export ERR as ErrorCodes from error-codes.js

[milahu]

export error codes

fix #555

#418 (comment)

this breaks rehype/test/parse-error.js in rehypejs/rehype#113

import p5errors from 'parse5/lib/common/error-codes.js'

Error [ERR_PACKAGE_PATH_NOT_EXPORTED]: Package subpath './lib/common/error-codes.js' is not defined by "exports" in node_modules/parse5/package.json imported from test/parse-error.js

wontfix in rehype, as ERR is not exported by parse5

→ export as ErrorCodes?

https://nodejs.org/api/esm.html

module files within packages can be accessed by appending a path to the package name unless the package's package.json contains an "exports" field, in which case files within packages can only be accessed via the paths defined in "exports".

[43081j]

looks good to me, lets see what @fb55 or @wooorm thinks

[wooorm]

I’m not sure if this is enough for rehype (refs #555), and if TS enums will work for it.
I am not objecting, assuming @fb55 thinks this is good to go in the public API surface.

[fb55]

Happy to add this. One nit, then this should be good to go.

[coveralls]

Coverage remained the same at 99.31% when pulling c43378b on milahu:patch-1 into 618fb8c on inikulin:master.

[fb55]

Thanks a lot @milahu!