Mapbender Starter 3.0.8-beta1

• Update mapbender/mapbender to 3.0.8-beta1
• Update mapbender/digitizer to 1.2-RC8
• Update mapbender/data-source to 0.1.10
• Update mapbender/vis-ui.js to 0.2.0
• Update mapbender/coordinates-utility to 1.0.6.1
• Update mapbender/icons to 1.5
• Removed mapbender/documentation dependency. The end user
  documentation will no longer be included by default and some of the build amenities have been removed from Mapbender Starter. Please see the main repository for standalone build instructions.
• Fix Exception on first bootstrap run, before parameters.yml is created
• Fix missing backend icons after first bootstrap run
• Fix CI build failures (PR#86)
• Ignore platform reqs in CI / automation environment composer install to allow clean php extension dependency modelling
• Remove nonfunctional remnant apigen-dependent commands; apigen required was removed 11 months ago
• Downgrade default log level from debug => info to reduce log spam and increase visibility of more significant messages