py-pyamg: dependency update and add v5.3.0 (spack#1238)

* pyamg update and fix

* Remove comment

Author: garth-wells

repos/spack_repo/builtin/packages/py_pyamg/package.py

@@ -18,6 +18,7 @@ class PyPyamg(PythonPackage):
 
     license("MIT")
 
+    version("5.3.0", sha256="c83e745f93e60a3fc1598ca6369049387403be1db4f6ac887866259c853f6364")
     version("5.0.0", sha256="088be4b38203e708905fa45295593c1336b127a28391486d4f5917cf0b96f5f2")
     version("4.2.3", sha256="dcf23808e0e8edf177fc4f71a6b36e0823ffb117137a33a9eee14b391ddbb733")
     version("4.1.0", sha256="9e340aef5da11280a1e28f28deeaac390f408e38ee0357d0fdbb77503747bbc4")
@@ -26,6 +27,7 @@ class PyPyamg(PythonPackage):
     depends_on("python", type=("build", "link", "run"))
     depends_on("[email protected]:", type=("build", "run"))
     depends_on("[email protected]:", type=("build", "run"))
+    depends_on("[email protected]:1.15", type=("build", "run"), when="@:5.2")
     depends_on("py-setuptools@42:", type="build", when="@4.2.0:")
     # Later version required due to
     # https://github.com/pypa/setuptools_scm/issues/758