- update to 2.7.6:
* Change the library and solver configuration path of builtin
version of Chuffed to prevent file conflicts
* Use the verbose compilation flag to control the verbosity of
the MIP domains stage
* Introduces the ``arg_val`` and ``arg_val_weak`` globals that
return the index of the first occurrence of a value in a given
array.
* Introduces the ``var_perm_sym`` and ``var_sqr_sym`` symmetry
breaking globals.
* Enable parallel search for the built-in Gecode presolver.
* Use native Qt dark mode on Windows where supported.
* Improve behaviour of the custom solver parameter dialog.
* ``ASTString`` constructor that uses ``std::string`` is now
explicit to avoid unexpected or unnecessary GC allocation.
* Circular definitions through the use of annotations will now
be reported as type errors, rather incurring infinite recursion
* Optimize the compilation of identical calls in different
contexts by recursively changing the contexts of the (uncompiled)
dependent calls, instead of flattening multiple times.
* Change domains of set variables when encountering (par)
equalities, or negated ``in`` constraints at the root level.
* Calls to ``min`` and ``max`` with ``par set of int`` type
argument will now be undefined (becoming ``false`` in the
closest Boolean context). This makes them consistent with
the calls with an argument of type ``var set of int``.
* Note that previous behaviour would have returned ``infinity``
or ``-infinity`` respectively (:bugref:`661`).
* Only show MOOC error code when response is actually an error
* Add documentation for ``--input-is-flatzinc`` flag