Bump applicationinsights from 2.7.0 to 2.7.3 (#508)

Bumps [applicationinsights](https://github.com/microsoft/ApplicationInsights-node.js) from 2.7.0 to 2.7.3.
- [Release notes](https://github.com/microsoft/ApplicationInsights-node.js/releases)
- [Commits](microsoft/ApplicationInsights-node.js@2.7.0...2.7.3)

---
updated-dependencies:
- dependency-name: applicationinsights
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>