Update scipy requirement from <1.6.0,>=1.0.0 to >=1.0.0,<1.7.0

Updates the requirements on [scipy](https://github.com/scipy/scipy) to permit the latest version.
- [Release notes](https://github.com/scipy/scipy/releases)
- [Commits](scipy/scipy@v1.0.0...v1.6.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

setup.py

@@ -30,7 +30,7 @@ def _get_long_description():
     python_requires='>=3.6, <4',
     install_requires=[
         'numpy >=1.11.0, <1.20.0',
-        'scipy >=1.0.0, <1.6.0',
+        'scipy >=1.0.0, <1.7.0',
     ],
     extras_require={
         'docs': ['sphinx >=2.3, <3', 'matplotlib >=3.1', 'numpydoc', 'm2r'],