Moving `domTraverseElements` to `XNode` class.

[leonelsanchesdasilva]

Resolves https://github.com/DesignLiquido/xslt-processor/issues/38

[github-actions[bot]]

Coverage report

St.:grey_question:	Category	Percentage	Covered / Total
🟡	Statements	70.15%	1403/2000
🟡	Branches	61.56%	623/1012
🟡	Functions	69.07%	201/291
🟡	Lines	70.43%	1317/1870

Show files with reduced coverage 🔻

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St.^{:grey_question:}

| File | Statements | Branches | Functions | Lines | | :----------------------------------------------------------------------------------------------------------------------------------------------------: | :--------------- | :------------------------------------------------------------ | :------------------------------------------------------------- | :------------------------------------------------------------- | :---------------------------------------------------------- | | 🟢 | dom/functions.ts |

84.62% (+0.72% 🔼)

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81.54% (+3.23% 🔼)

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76.92% (-1.65% 🔻)

|

85% (+0.93% 🔼)

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Test suite run success

53 tests passing in 14 suites.

Report generated by 🧪jest coverage report action from 5294cdaa1545b85b58600146a344c888b2ca0e0e