Bump simple-git, serverless and serverless-step-functions#14

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dependabot/npm_and_yarn/simple-git-and-serverless-and-serverless-step-functions-3.15.1v-studios/stepfunctions-parallel-error:dependabot/npm_and_yarn/simple-git-and-serverless-and-serverless-step-functions-3.15.1Copy head branch name to clipboard