New release 1.1.0

 * Switch from EMF Forms to Sirius
 * Replace QuantityLong and QuantityDouble by Quantity (only doubles)
 * Switch from JDK 15 to JDK 16
 * Add obligatory annotation for minnimal and maximal values
 * Allow dimensionless and/or nullable Quantites
 * Tests for nullable and dimensionless Quantites