always use latest layer version

[orr-levinger]

When i redeploy my lambda it uses the layer version 1 even though i the latest version is 2 after changing the package.json i changed it manually and it works but the plugin should do it for me

[RaissaBergamini]

Had the same issue in a project when deploying. It was on layer version 4, a version 5 was created but the lambdas were not updated to it on its own. @orr-levinger did you figure out what was the issue?

[brunocasado]

same here

[agutoli]

Bugfix version: [2.6.1](https://www.npmjs.com/package/serverless-layers/v/2.6.1). Please let me know if it works.