Fix external link handling in SimpleLinkService#221
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- validate URL before assigning to anchor - restrict protocols to http/https/mailto/tel - support newWindow parameter - add configurable externalLinkTarget and externalLinkRel
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While working with vue-pdf I noticed that external links rendered from PDFs did not set
targetandrelattributes on the generated anchor elements. This stemmed from an empty implementation ofaddLinkAttributesinSimpleLinkService.This PR implements the following improvements:
newWindowparameterexternalLinkTargetandexternalLinkRelwindowis unavailableBuild and tests pass locally. Tested locally with PDFs containing external hyperlinks.