Update lockfile to explicitly use python 3.7.12

Author: SamProkopchuk

poetry.lock

@@ -13,13 +13,13 @@ license = "MIT"
 
 
 [tool.poetry.dependencies]
-python = "^3.7"
+python = "3.7.12"
 requests = "~2"
 tqdm = "~4"
 ipywidgets = "~7"
 ipython = "*"
 ibm-cos-sdk = {version = "~2", optional = true}
-typing-extensions = {version = "*", python = "^3.5", optional = true}
+typing-extensions = {version = "*", python = "^3.7.12", optional = true}
 # Sphinx documentation dependencies
 Sphinx = { version = "~4", optional = true }
 sphinx-autodoc-typehints = { version = "~1", optional = true }