Issue with global Inputmask.prototype reference (easy fix)

[antch]

Description: Using inputmask in certain build environments can cause a JavaScript error when calling mask():

core.js:4352 ERROR TypeError: Inputmask.prototype.analyseMask is not a function
    at generateMask (mask-lexer.js:40)
    at generateMaskSet (mask-lexer.js:91)
    at inputmask.js:87
    at Array.forEach (<anonymous>)
    at Inputmask.mask (inputmask.js:84)

Reproduction: I don't have one, but hopefully the issue is apparent. This is occurring when using Inputmask from an Angular Custom Element that imports via ES6 import.

Browser: Chrome 92
Inputmask version: 5.0.6

Analysis:

I troubleshot this issue for awhile, and only after I changed my import to node_modules/inputmask/bundle did I see the more helpful stack trace above. This is happening because Inputmask is exported to window in inputmask.js, but is not imported in mask-lexer.js which means that the Inputmask.prototype being imported is the one from window.Inputmask -- this does not have an analyseMask function in my environment.

Fix:
By explicitly importing in mask-lexer.js, the error goes away:

import Inputmask from './inputmask';

[RobinHerbots]

@antch ,

Thx for the issue! I will submit a patch asap.

[antch]

Thank you for getting to this so quickly. Just FYI, I also ran into #2285 and this import fixes that as well, at least for me.