Fix Issue #2276

Convert source.filePath to its absolute path to be comparable to importPath/filePath on Windows

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Description

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Fixes # (issue)

Type of change

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[X] Bug fix (non-breaking change which fixes an issue)

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How Has This Been Tested?

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[ ] Test A
[ ] Test B

Test Environment:

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Checklist:

[ ] I have followed the CONTRIBUTING doc and the style guidelines of this project
[ ] I have performed a self-review of my own code
[ ] I have commented my code, particularly in hard-to-understand areas
[ ] I have made corresponding changes to the documentation
[ ] My changes generate no new warnings
[ ] I have added tests that prove my fix is effective or that my feature works
[ ] New and existing unit tests and linter rules pass locally with my changes
[ ] Any dependent changes have been merged and published in downstream modules

Further comments

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dimaMachina / graphql-eslint

Fix Issue #2276 #2277