gnu: python-pyparsing: Update to 3.2.1.

* gnu/packages/python-build.scm (python-pyparsing): Update to 3.2.1.
[build-system]: Switch to pyproject-build-system.
[native-inputs]: Add python-flit-core.
(python-pyparsing-2.4.7)[native-inputs]: Add python-setuptools,
python-wheel.

gnu/packages/python-build.scm

@@ -412,14 +412,14 @@ installed with a newer @code{pip} or with wheel's own command line utility.")
 (define-public python-pyparsing
   (package
     (name "python-pyparsing")
-    (version "3.0.6")
+    (version "3.2.1")
     (source
      (origin
        (method url-fetch)
        (uri (pypi-uri "pyparsing" version))
        (sha256
-        (base32 "109b9r802wb472hgmxclljprh5cid0w3p6mk9alba7pg2c0frgfr"))))
+        (base32 "02jz5rv3vx46xvjszda467l269jz9narlrwd0a83mpk6zma0i631"))))
-    (build-system python-build-system)
+    (build-system pyproject-build-system)
     (outputs '("out" "doc"))
     (arguments
      `(#:tests? #f                      ;no test target
@@ -440,6 +440,7 @@ installed with a newer @code{pip} or with wheel's own command line utility.")
                        (find-files dir ".*")))
                 (list "docs" "htmldoc" "examples")
                 (list doc html-doc examples))))))))
+    (native-inputs (list python-flit-core))
     (home-page "https://github.com/pyparsing/pyparsing")
     (synopsis "Python parsing class library")
     (description
@@ -459,7 +460,8 @@ that client code uses to construct the grammar directly in Python code.")
        (method url-fetch)
        (uri (pypi-uri "pyparsing" version))
        (sha256
-        (base32 "1hgc8qrbq1ymxbwfbjghv01fm3fbpjwpjwi0bcailxxzhf3yq0y2"))))))
+        (base32 "1hgc8qrbq1ymxbwfbjghv01fm3fbpjwpjwi0bcailxxzhf3yq0y2"))))
+    (native-inputs (list python-setuptools python-wheel))))
 
 (define-public python-packaging-bootstrap
   (package