feat: v1.2.2 will be the last version of okama supporting legacy Python 3.7

Author: chilango74

main.py

@@ -1,4 +1,3 @@
 import okama as ok
 
-x = ok.AssetList(["SPY.US", "BND.US", "GLD.US"], inflation=False)
-print(x.assets_last_dates)
+print(ok.__version__)

okama/__init__.py

@@ -19,8 +19,6 @@
 - Matplotlib visualization scripts for the Efficient Frontier, Transition map and assets risk / return performance
 
 """
-from importlib_metadata import version
-
 from okama.asset import Asset
 from okama.asset_list import AssetList
 from okama.portfolio import Portfolio
@@ -39,4 +37,4 @@
 from okama.common.helpers.helpers import Float, Frame, Rebalance, Date
 import okama.settings
 
-__version__ = version("okama")
+__version__ = "1.2.2"

pyproject.toml

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "okama"
-version = "1.2.1"
+version = "1.2.2"
 description = "Investment portfolio analyzing & optimization tools"
 authors = ["Sergey Kikevich <chilango74@gmail.com>"]
 license = "MIT"
@@ -31,8 +31,6 @@ pandas = ">=1.0.0"
 scipy = ">=0.14.0"
 matplotlib = "^3.5.1"
 requests = "^2.27.1"
-# required for python 3.7 only for 3.8+ can use `from importlib.metadata import version`
-importlib-metadata = "^4.11.1"
 joblib = "^1.1.0"
 
 [tool.poetry.dev-dependencies]