Bump xml2js, aws-appsync and aws-sdk#20

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dependabot/npm_and_yarn/xml2js-and-aws-appsync-and-aws-sdk-0.5.0ModusCreateOrg/serverless-allthethings:dependabot/npm_and_yarn/xml2js-and-aws-appsync-and-aws-sdk-0.5.0Copy head branch name to clipboard