PhPackage need update

[levBagryansky]

We need update it in several places: 1) https://github.com/objectionary/eo/blob/master/eo-runtime/src/test/java/org/eolang/PhPackageTest.java#L171 goto does not exist now, we have go. Currently it returns new PhPackage according to https://github.com/objectionary/eo/blob/master/eo-runtime/src/main/java/org/eolang/PhPackage.java#L96 2) https://github.com/objectionary/eo/blob/master/eo-runtime/src/main/java/org/eolang/PhPackage.java#L57 We can get rid of ConcurrentHashMap or ThreadLock here. 3) Now if PhPackage does not have attribute to be found, it returns new PhPackage(this.eoPackage(name)) (in https://github.com/objectionary/eo/blob/master/eo-runtime/src/main/java/org/eolang/PhPackage.java#L96) . So it does not even check if the package exists. May be it would be better to throw exception if there is not such package? @yegor256 WDYT?

Also there is deadlock somewhere according to #3245 but I cannot repeat error.

[github-actions[bot]]

@levBagryansky thanks for the report, here is a feedback:

Problems

• The bug report lacks a clear and informative title, failing to specify the nature of the bug or the segment of the PhPackage that requires updating.
• The report lacks an explanation or context for the necessary code update, offering no insights into why goto is rendered invalid or why go is now the preferred alternative.
• The report fails to provide any information about the expected or current behavior of the code, leaving the problem caused by the reported issue unclear.

I would recommend providing a clear and descriptive title that specifies the necessary updates in the PhPackage.

Please fix the bug report in order it to get resolved faster. Analyzed with gpt-4

[levBagryansky]

@volodya-lombrozo WDYT