Updated changelog

Added simpleExpress named export, updated version to 3.1.2

Fixed return types of simpleExpress function, updated version to 3.1.1

Updated build

Merge pull request #9 from Lukasz-pluszczewski/v3

V3

Improved typescript typings (added Promise<void> as possible return f…

…rom handler)

Added typescript typings, updated dependencies

Merge pull request #7 from Lukasz-pluszczewski/plugins-support

Updated readme

Merge pull request #5 from Lukasz-pluszczewski/handleErrorUpdates

Updated readme, added more handleError features, updated handleError …

Updated version in package.json to 2.0.3