Remove Plotly 6 restriction

Author: polakowo

setup.py

@@ -25,7 +25,7 @@
         'pandas',
         'scipy',
         'matplotlib',
-        'plotly>=4.12.0, <6.0.0',
+        'plotly>=4.12.0',
         'ipywidgets>=7.0.0',
         "numba>=0.53.1, <0.57.0; python_version<'3.10'",
         "numba>=0.56.0, <0.57.0; python_version>='3.10' and python_version<'3.11'",

vectorbt/_version.py

@@ -1,4 +1,4 @@
 # Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
-__version__ = "0.28.0"
+__version__ = "0.28.1"