Update sympy to 1.9

[pyup-bot]

This PR updates sympy from 1.8 to 1.9.

Changelog

1.9

See https://github.com/sympy/sympy/wiki/release-notes-for-1.9 for the release notes.

<table> <tr> <th> Filename </th> <th> Description </th> <th> size </th> <th> sha256 </th> </tr> <tr> <td> <a href="https://github.com/sympy/sympy/releases/download/sympy-1.9/sympy-1.9.tar.gz"> <b> sympy-1.9.tar.gz </b> </a> </td> <td> The SymPy source installer. </td> <td> 6.6M </td> <td> c7a880e229df96759f955d4f3970d4cabce79f60f5b18830c08b90ce77cd5fdc </td> </tr> <tr> <td> <a href="https://github.com/sympy/sympy/releases/download/sympy-1.9/sympy-1.9-py3-none-any.whl"> <b> sympy-1.9-py3-none-any.whl </b> </a> </td> <td> A wheel of the package. </td> <td> 5.9M </td> <td> 8bc5de4608b7aa4e7ffd1b25452ae87ccc5f6ca667c661aafb854a1ade337d0c </td> </tr> <tr> <td> <a href="https://github.com/sympy/sympy/releases/download/sympy-1.9/sympy-docs-html-1.9.zip"> <b> sympy-docs-html-1.9.zip </b> </a> </td> <td> Html documentation. This is the same as
the <a href="https://docs.sympy.org/latest/index.html">online documentation</a>. </td> <td> 30M </td> <td> 3ca9e0a07e0eb2c8d9a39d640a486060b154a4866eba6e051b5add6a31b34f95 </td> </tr> <tr> <td> <a href="https://github.com/sympy/sympy/releases/download/sympy-1.9/sympy-docs-pdf-1.9.pdf"> <b> sympy-docs-pdf-1.9.pdf </b> </a> </td> <td> Pdf version of the <a href="https://docs.sympy.org/latest/index.html"> html documentation</a>. </td> <td> 12M </td> <td> 2527db3dc4e58f74e8eda65d2e2dba9de8c1a7fc8d6a2326227d4346ca71a3ab </td> </tr> </table>

**Note**: Do not download the **Source code (zip)** or the **Source code (tar.gz)**
files below.

1.9rc1

See https://github.com/sympy/sympy/wiki/release-notes-for-1.9 for the release notes.

<table> <tr> <th> Filename </th> <th> Description </th> <th> size </th> <th> sha256 </th> </tr> <tr> <td> <a href="https://github.com/sympy/sympy/releases/download/sympy-1.9rc1/sympy-1.9rc1.tar.gz"> <b> sympy-1.9rc1.tar.gz </b> </a> </td> <td> The SymPy source installer. </td> <td> 6.6M </td> <td> aee608377f4224e1c3c08de0c344a2ef915f1e5aec549930537f8bd77c6b64d1 </td> </tr> <tr> <td> <a href="https://github.com/sympy/sympy/releases/download/sympy-1.9rc1/sympy-1.9rc1-py3-none-any.whl"> <b> sympy-1.9rc1-py3-none-any.whl </b> </a> </td> <td> A wheel of the package. </td> <td> 5.9M </td> <td> a1abd5feca9f6b28011e7e7d81a4789032b717c8d36f705bf8947c4142767b5c </td> </tr> <tr> <td> <a href="https://github.com/sympy/sympy/releases/download/sympy-1.9rc1/sympy-docs-html-1.9rc1.zip"> <b> sympy-docs-html-1.9rc1.zip </b> </a> </td> <td> Html documentation. This is the same as
the <a href="https://docs.sympy.org/latest/index.html">online documentation</a>. </td> <td> 30M </td> <td> ef24452e0e44cd000c998b96204285de32942ba3505920b3aa8f7230b4fb8380 </td> </tr> <tr> <td> <a href="https://github.com/sympy/sympy/releases/download/sympy-1.9rc1/sympy-docs-pdf-1.9rc1.pdf"> <b> sympy-docs-pdf-1.9rc1.pdf </b> </a> </td> <td> Pdf version of the <a href="https://docs.sympy.org/latest/index.html"> html documentation</a>. </td> <td> 12M </td> <td> 8d3d321fc3c5981ecca459002d0f21e37c72630b7c7e94c0f038019d3fe0884a </td> </tr> </table>

**Note**: Do not download the **Source code (zip)** or the **Source code (tar.gz)**
files below.

Links

• PyPI: https://pypi.org/project/sympy
• Changelog: https://pyup.io/changelogs/sympy/
• Homepage: https://sympy.org
• Docs: https://pythonhosted.org/sympy/

[pyup-bot]

Closing this in favor of #210