Drop Python 3.7 support

Author: mfisher87

README.rst

@@ -24,7 +24,7 @@ Contact:
   Nathaniel J. Smith <njs@pobox.com> and Stéfan van der Walt <stefanv@berkeley.edu>
 
 Dependencies:
-  * Python 3.7+
+  * Python 3.8+
   * `colorspacious <https://pypi.python.org/pypi/colorspacious>`_
   * Matplotlib
   * NumPy

pyproject.toml

@@ -15,7 +15,7 @@ classifiers = [
   "Programming Language :: Python :: 3",
 ]
 
-requires-python = "~=3.7"
+requires-python = "~=3.8"
 dependencies = [
   "numpy",
   "matplotlib",
@@ -46,10 +46,10 @@ package-data = {viscm = ["examples/*"]}
 
 
 [tool.black]
-target-version = ["py37", "py38", "py39", "py310", "py311"]
+target-version = ["py38", "py39", "py310", "py311"]
 
 [tool.ruff]
-target-version = "py37"
+target-version = "py38"
 select = ["F", "E", "W", "C90", "I", "UP", "YTT", "B", "A", "C4", "T10", "RUF"]
 
 [tool.ruff.mccabe]