[Snyk] Security upgrade org.webjars:bootstrap from 3.3.6 to 4.0.0#31

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snyk-fix-e3867593fb65548a5c3a2b916f1518adradhakrishna4687/sample-java-webapp-1:snyk-fix-e3867593fb65548a5c3a2b916f1518adCopy head branch name to clipboard