Bump node-fetch and puppeteer-core in /src#3

dependabot[bot] wants to merge 1 commit intomasterbeneboy/lambda-browser-screenshots:masterfrom

dependabot/npm_and_yarn/src/node-fetch-and-puppeteer-core-2.6.7beneboy/lambda-browser-screenshots:dependabot/npm_and_yarn/src/node-fetch-and-puppeteer-core-2.6.7Copy head branch name to clipboard