2.1.0-beta

feat: add support for new constraint operators (#86)

* feat: new operators

* feat: IConstraintOperator

* numberconstraintoperator tests

* implement numberconstraintoperator

* add single value property to constraint

* feat: add date constraint operator and tests

* improvement: use constraint Value instead of Values for number constraints

* feat: add caseinsensitive to constraint

* feat: stringconstraintoperator and tests

* feat: add semver constraint operator

* feat: add the new operator evaluators to ConstraintUtils

* fix broken deserialization of Constraint

* add inverted

* feat: add support for inverted constraints

* switch to Values prop for string conditions

* fix broken Operator.IN tests

* add context currenttime

* fix decimal point issue with float/double parsing

* disable tests that require live access token

* forgot to push namespace import

* add tests for multiple words in .Values

* switch to .Value only for semver constraint operator

* make nullable

* fix build errors for lower .NET versions