workaround java version issue with jitpack

don't use the fancy new toString that was added in java 10 ...

Fix java version so jitpack works

• java version was 1.8 and we use stuff from later jdks; this broke the jitpack release
• update all the dependencies to current versions

Improve block dsl

• blocks can now capture stdout and return values
• you can customize the texts for this
• get rid of a few variations of this

Fix build file so jitpack can do its thing

v0.1.1

fix artifact name

First release

Simple functionality for generating markdown lifted from my es-kotlin-wrapper-client project with some improvements.

There will likely be some follow up releases before this stabilizes as I migrate that project to depend on this project.