2.8.2 Bug release (OpenMP/C++23)

 - openmp loops that iterate over xrange now work

 - C++20's `std::format` did not work, or not correctly, with
   rarrays, but now does. As a result, C++23's `std::print[ln]`
   now also works with rarrays.

v2.8.1 Bug release

Fixes a bug in 2.8.0 which made every slice of a 1d array zero-sized.

2.8.0 Make_rarray functions

• Added make_rarray functions
• Made rarray<T,R>::rank() static
• Fixed bug in reshape to a smaller size

2.7.0 Fill and form methods; improved docs

• Added fill and form methods, which take nested curly brace initializer lists to set values or create a new rarray based on the initializer's shape.
• Added a slice method. Slicing is possible only in the first dimension, to preserve a contiguous layout of the array elements.
• Better documentation, with tutorial now in markdown and developer documentation that can be generated with doxygen.

2.6.1 Code cleanup

v2.6.1

This is version 2.6.1. Code had major cleanup but should be functiona…

2.6.0 Bug fixes, better const type support, multidimensional subscripts

• Bug fixes (inlining, compiler settings, exception safety).
• Support for the multidimensional subscript operator for c++23 compilers.
• Better support for rarray<const T,R>.
• Implicit conversion operator from rarray<T,R> to rarray<const T,R>.

2.5.1 Bug fixes, code and documentation cleanup

• Bug fixes, most importantely bounds checking of 1d arrays
• 100% code coverage in tests
• Comparison with mdspan (C++23)
• Updated documentation.

Optional bounds checking is back as is conversion from square brackets to submatrices

Optional bounds checking is back, conversion of rows to vectors, bug fixed

2.4.1 Bug fix in rarray::at(); remove unneeded rarray<T,0> instantiation

Bug fix in rarray<T,1>::at()
Removed now unneeded rarray<T,0> instantiation.

2.4.0 Code improvements, exception safety, bug fixes, icpx support

Internal refactoring focussed on eliminating warnings, dead code, version tracking in code, and exception safety.
Fixed bug for compound data types.
Support added for Intel OneAPI's icpx C++ compiler.