chore: dropping support for Python < 3.8

Signed-off-by: Silvano Cirujano Cuesta <silvano.cirujano-cuesta@siemens.com>

Author: Silvanoc

pyproject.toml

@@ -26,9 +26,11 @@ classifiers = [
     "Intended Audience :: Healthcare Industry",
     "License :: CC0 1.0 Universal (CC0 1.0) Public Domain Dedication",
     "Topic :: Software Development :: Libraries :: Python Modules",
-    "Programming Language :: Python :: 3.7",
     "Programming Language :: Python :: 3.8",
-    "Programming Language :: Python :: 3.9"
+    "Programming Language :: Python :: 3.9",
+    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
 ]
 
 packages = [
@@ -40,8 +42,7 @@ comparefiles = "linkml_runtime.utils.comparefiles:cli"
 linkml-normalize = "linkml_runtime.processing.referencevalidator:cli"
 
 [tool.poetry.dependencies]
-python = "^3.7.6"
-
+python = "^3.8"
 click = "*"
 deprecated = "*"
 hbreader = "*"