[TIKA-4119]: Return media type "text/javascript" instead of "application/javascript" to follow RFC-9239

[marcospereira]

What

Fixes TIKA-4119.

Additionally, I've added support for ".mjs" files, as documented in the RFC:

Additional information:

Deprecated alias names for this type: application/javascript, application/x-javascript, text/javascript1.0, text/javascript1.1, text/javascript1.2, text/javascript1.3, text/javascript1.4, text/javascript1.5, text/jscript, text/livescript

Magic number(s): N/A
File extension(s): .js, .mjs
Macintosh File Type Code(s): TEXT

[tballison]

Overall, this looks great. As noted, there are a couple of changes that are unrelated to the goal of the PR. Thank you!

[marcospereira]

@tballison, thanks for the quick review. This should be in a better state now.

[tballison]

Failures: 
Error:    TestMimeTypes.testCodeFormats:1151->assertTypeByName:1385 expected: <application/javascript> but was: <text/javascript>
Error:    TestMimeTypes.testTextBasedFormatsDetection:721->assertTypeByName:1385 expected: <application/javascript> but was: <text/javascript>

Doh Something went wrong in the tests.

[marcospereira]

Alright, it should be good now. At least all the tests passed twice when running on my machine. :-)

[tballison]

Thank you, @marcospereira !

[marcospereira]

Thank you, @marcospereira !

Thank you, @tballison. I see https://issues.apache.org/jira/browse/TIKA-4119 is still marked as "open". Is there something I need to do on my end or is it just out of sync with the changes here?