v2.2.0

v2.2.0

• Dropped tests for net6.0 and addes tests for net8.0
• Added a new overload to the calculator which accepts an options object. Additionally, it is now possible to configure a special case that applies different handling for formulas that start with a negative power, e.g. -2^2. This would typically be parsed as (-2)^2, but with the new option, it can be configured to be parsed as -(2^2). It is not recommended to use this option, since most other software (e.g. Microsoft Excel and Google Sheets) do also not behave in that way.
• Square [] and curly {} parentheses are now also valid for formulas. They are only used to group expressions, and implicit multiplication like 2(3)=6 is not allowed with those