[EN-1712] version for dev environment

Author: iamishalkin

dxfeed/__init__.py

@@ -2,5 +2,10 @@
 from dxfeed.core.utils.handler import EventHandler, DefaultHandler
 import pkg_resources
 
-
-__version__ = pkg_resources.get_distribution('dxfeed').version
+try:
+    __version__ = pkg_resources.get_distribution('dxfeed').version
+except pkg_resources.DistributionNotFound:
+    import toml
+    from pathlib import Path
+    pyproject = toml.load(Path(__file__).parents[1].joinpath('pyproject.toml'))
+    __version__ = pyproject['tool']['poetry']['version']