Update "node" engine to ">= 6.10"

Update "node" engine version (#45)

This fixes CI for `perf-monitor`. `yarn` checks for this and refuses to install a package if it's not compatible with the current Node.js version.

Add shared Babel configuration for AWS Lambda

Add AWS Lambda babel configuration file (#44)

This should be used in all the Lambda repos  that we have

Update lint-staged to 7.0.0

v3.2.5

Update lint-staged to suppress yarn peerDependencies warning (#43)

Rewrite helpers in TypeScript, compile to Node.js 6.2

v3.2.4

Configure publish settings (#42)