python-prompt-toolkit version upgrade

Author: gfrlv

setup.py

@@ -19,7 +19,7 @@
 install_requirements = [
     'click >= 7.0',
     'Pygments >= 1.6',
-    'prompt_toolkit>=2.0.6,<3.0.0',
+    'prompt_toolkit>=3.0.0,<4.0.0',
     'PyMySQL >= 0.9.2',
     'sqlparse>=0.3.0,<0.4.0',
     'configobj >= 5.0.5',