Delete package-lock.json

Merge pull request #13 from aws-samples/dependabot/npm_and_yarn/web-app/postcss-7.0.39

Bump postcss from 7.0.27 to 7.0.39 in /web-app

Merge pull request #10 from aws-samples/dependabot/npm_and_yarn/web-app/shell-quote-1.7.3

Merge pull request #11 from aws-samples/dependabot/npm_and_yarn/web-app/url-parse-1.5.10

Merge pull request #12 from aws-samples/dependabot/npm_and_yarn/web-app/lodash-4.17.21

Bump lodash from 4.17.19 to 4.17.21 in /web-app

Bump url-parse from 1.4.7 to 1.5.10 in /web-app

Bump shell-quote from 1.7.2 to 1.7.3 in /web-app

Merge pull request #6 from aws-samples/dependabot/npm_and_yarn/web-app/async-2.6.4

Merge pull request #7 from aws-samples/dependabot/npm_and_yarn/web-app/eventsource-1.1.1

Merge pull request #9 from aws-samples/dependabot/npm_and_yarn/web-app/terser-4.8.1

Merge pull request #8 from aws-samples/dependabot/npm_and_yarn/web-app/thenify-3.3.1

Bump terser from 4.6.6 to 4.8.1 in /web-app

Bump thenify from 3.3.0 to 3.3.1 in /web-app