Fix issue that local part parser uses remaining code from lexer with multiple email addresses

[stefangr]

This issue resolves an issue when you use the EmailValidator for multiple email addresses without creating a new instance for every email address (Similar to issue 150).

Without this fix the added test will output

1) Egulias\EmailValidator\Tests\EmailValidator\EmailParserTest::testMultipleEmailAddresses Failed asserting that two strings are identical.
--- Expected
+++ Actual
@@ @@
-'another-local-part'
+'some-random-but-large-domain-part.example.comanother-local-part'

[codacy-production]

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Coverage variation	Diff coverage
Report missing for 51534601	✅ 100.00%

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (5153460)	Report Missing	Report Missing	Report Missing
Head commit (5777388)	715	656	91.75%

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Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#409)	1	1	100.00%

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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[egulias]

Thanks for the PR @stefangr !