HepLib: A C++ library for high energy physics (version 1.1)

HepLib is a C++ Library for computations in High Energy Physics, it builds on top of other well-established libraries or programs, including GiNaC, Fermat, Form, Fire, etc., its first version has been released in Comput. Phys. Commun. 265 (2021) 107982. Here we provide a minor upgraded version with parts of obligated aspects removed and many new features added, the main feature in this new version is to use Flint for the simplification on multi-variate polynomial, so one can replace the process-based parallelism by the thread-based parallelism for the related polynomial evaluations to achieve a higher performance.