gnu: python-pypeg2: Switch to pyproject.

* gnu/packages/python-xyz.scm (python-pypeg2):
[build-system]: Switch to pyproject-build-system.
[arguments]<#:tests?>: Enable them.
[native-inputs]: Add python-pytest, python-setuptools.
[description]: Improve style.

Change-Id: I354cf087b2076bf7bd4643290429a4e4630ca004
Signed-off-by: Sharlatan Hellseher <sharlatanus@gmail.com>
Signed-off-by: Rutherther <rutherther@ditigal.xyz>

gnu/packages/python-xyz.scm

@@ -24433,18 +24433,16 @@ Problem} (SAT) solver.")
        (method url-fetch)
        (uri (pypi-uri "pyPEG2" version))
        (sha256
-        (base32
-         "0v8ziaam2r637v94ra4dbjw6jzxz99gs5x4i585kgag1v204yb9b"))))
-    (build-system python-build-system)
+        (base32 "0v8ziaam2r637v94ra4dbjw6jzxz99gs5x4i585kgag1v204yb9b"))))
+    (build-system pyproject-build-system)
+    (native-inputs (list python-pytest python-setuptools))
     (propagated-inputs (list python-lxml))
-    (arguments
-     ;;https://bitbucket.org/fdik/pypeg/issues/36/test-failures-on-py35
-     '(#:tests? #f))
     (home-page "https://fdik.org/pyPEG/")
     (synopsis "Parsing Expression Grammars in Python")
-    (description "PyPEG is an intrinsic parser interpreter framework for
-     Python.  It is based on Parsing Expression Grammars, PEG.  With pyPEG you can
-     parse many formal languages.")
+    (description
+     "PyPEG is an intrinsic parser interpreter framework for Python.  It is
+based on Parsing Expression Grammars, PEG.  With pyPEG you can parse many
+formal languages.")
     (license license:gpl2)))
 
 (define-public python-pyformlang