adding exact parameter to `get_mass_properties` `check` call. Thanks to 

@JasperBoogers v3.1.1

Added improved `is_closed_check` thanks to @jb-leger v3.1.0

Added more type hinting v3.0.1

Made sure floating point numbers are not truncated. Fixes #192 v3.0.0

Made sure floating point numbers are not truncated. Fixes #192 v2.17.1

Thanks to @Xorgon for: Added centroids as a mesh property v2.17.0

testing fix for #173 v2.16.3

Merge tag 'v2.16.1' into develop

fixed proper naming while saving file thanks to @hyperkang v2.16.1

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Merge pull request #177 from simright/fix.solid_name

make Mesh.name effective as the name after "solid" in ASCII mode

disabled qt5 testing for now