documentate generic error handler

Bump node-fetch from 2.6.0 to 2.6.1 (spring-media#55)

Bumps [node-fetch](https://github.com/bitinn/node-fetch) from 2.6.0 to 2.6.1.
- [Release notes](https://github.com/bitinn/node-fetch/releases)
- [Changelog](https://github.com/node-fetch/node-fetch/blob/master/docs/CHANGELOG.md)
- [Commits](node-fetch/node-fetch@v2.6.0...v2.6.1)

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

prepare release version 0.9.0

Bump lodash from 4.17.15 to 4.17.19 (spring-media#47)

Bumps [lodash](https://github.com/lodash/lodash) from 4.17.15 to 4.17.19.
- [Release notes](https://github.com/lodash/lodash/releases)
- [Commits](lodash/lodash@4.17.15...4.17.19)

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

add api gateway example; prepare release 0.8.3

add release doku

fix travis npm publish

Proxy integration improvements (spring-media#36)

* improve Proxy integration return values
* fix ProxyIntegrationEvent body type
* consistently use statusCode
* add aws-lambda as dep
* improve README

prepare version 0.7.1

improve documenation for proxyPath + add tests (spring-media#32)