Bump h2 from 4.1.0 to 4.3.0 in /src/test/regress

Bumps [h2](https://github.com/python-hyper/h2) from 4.1.0 to 4.3.0.
- [Changelog](https://github.com/python-hyper/h2/blob/master/CHANGELOG.rst)
- [Commits](https://github.com/python-hyper/h2/compare/v4.1.0...v4.3.0)

---
updated-dependencies:
- dependency-name: h2
  dependency-version: 4.3.0
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>

src/test/regress/Pipfile.lock

@@ -304,27 +304,28 @@
         },
         "h2": {
             "hashes": [
-                "sha256:03a46bcf682256c95b5fd9e9a99c1323584c3eec6440d379b9903d709476bc6d",
-                "sha256:a83aca08fbe7aacb79fec788c9c0bac936343560ed9ec18b82a13a12c28d2abb"
+                "sha256:6c59efe4323fa18b47a632221a1888bd7fde6249819beda254aeca909f221bf1",
+                "sha256:c438f029a25f7945c69e0ccf0fb951dc3f73a5f6412981daee861431b70e2bdd"
             ],
-            "markers": "python_full_version >= '3.6.1'",
-            "version": "==4.1.0"
+            "index": "pypi",
+            "markers": "python_version >= '3.9'",
+            "version": "==4.3.0"
         },
         "hpack": {
             "hashes": [
-                "sha256:84a076fad3dc9a9f8063ccb8041ef100867b1878b25ef0ee63847a5d53818a6c",
-                "sha256:fc41de0c63e687ebffde81187a948221294896f6bdc0ae2312708df339430095"
+                "sha256:157ac792668d995c657d93111f46b4535ed114f0c9c8d672271bbec7eae1b496",
+                "sha256:ec5eca154f7056aa06f196a557655c5b009b382873ac8d1e66e79e87535f1dca"
             ],
-            "markers": "python_full_version >= '3.6.1'",
-            "version": "==4.0.0"
+            "markers": "python_version >= '3.9'",
+            "version": "==4.1.0"
         },
         "hyperframe": {
             "hashes": [
-                "sha256:0ec6bafd80d8ad2195c4f03aacba3a8265e57bc4cff261e802bf39970ed02a15",
-                "sha256:ae510046231dc8e9ecb1a6586f63d2347bf4c8905914aa84ba585ae85f28a914"
+                "sha256:b03380493a519fce58ea5af42e4a42317bf9bd425596f7a0835ffce80f1a42e5",
+                "sha256:f630908a00854a7adeabd6382b43923a4c4cd4b821fcb527e6ab9e15382a3b08"
             ],
-            "markers": "python_full_version >= '3.6.1'",
-            "version": "==6.0.1"
+            "markers": "python_version >= '3.9'",
+            "version": "==6.1.0"
         },
         "iniconfig": {
             "hashes": [