Bump json5, convict, @microsoft/node-library-build and @microsoft/gulp-core-build#18
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dependabot[bot] wants to merge 1 commit intomasterfrom dependabot/npm_and_yarn/json5-and-convict-and-microsoft/node-library-build-and-microsoft/gulp-core-build-2.2.3
+4,578-3,297
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