Add basic migrations

docs/_build/html/index.html

@@ -162,6 +162,7 @@ sqlite3 database.</p>
 <li class="toctree-l1"><a class="reference internal" href="datalite.html">datalite package</a><ul>
 <li class="toctree-l2"><a class="reference internal" href="datalite.html#datalite-module">datalite Module</a></li>
 <li class="toctree-l2"><a class="reference internal" href="datalite.html#module-datalite.fetch">datalite.fetch module</a></li>
+<li class="toctree-l2"><a class="reference internal" href="datalite.html#module-datalite.migrations">datalite.migrations module</a></li>
 </ul>
 </li>
 </ul>