disable dependbot and remove pinned dependencies

* disable dependabot for dependencies
* remove obsolete dependabot readme
* remove the pinned testing requirements file
* install the testing extra in nox instead

Author: mcflugen

.github/dependabot.yml

@@ -7,8 +7,3 @@ updates:
     directory: "/"
     schedule:
       interval: "daily"
-
-  - package-ecosystem: "pip"
-    directory: "/requirements"
-    schedule:
-      interval: "daily"

noxfile.py

@@ -13,8 +13,7 @@
 @nox.session
 def test(session: nox.Session) -> None:
     """Run the tests."""
-    session.install("-r", "requirements/requires.txt", "-r", "requirements/testing.txt")
-    session.install(".", "--no-deps")
+    session.install(".[testing]")
 
     args = ["--cov", PROJECT, "-vvv"] + session.posargs
 

pyproject.toml

@@ -57,6 +57,13 @@ content-type = "text/markdown"
 [tool.setuptools.dynamic.version]
 attr = "bmipy._version.__version__"
 
+[tool.setuptools.optional-dependencies]
+testing = [
+  "coveralls",
+  "pytest-cov",
+  "pytest",
+]
+
 [tool.setuptools.packages.find]
 where = [
     "src",