pyproject.toml: allow newer meson version

The version was pinned to 0.61.2 because there was an incompatibility
between newer version of meson and mesonpep517.

Signed-off-by: Daniel Wagner <[email protected]>

Author: igaw

pyproject.toml

@@ -1,6 +1,6 @@
 # SPDX-License-Identifier: LGPL-2.1-or-later
 [build-system]
-requires = ["mesonpep517", "wheel", "meson==0.61.2", "ninja"] # PEP 508 specifications.
+requires = ["mesonpep517", "wheel", "meson", "ninja"] # PEP 508 specifications.
 build-backend = "mesonpep517.buildapi"
 
 [tool.mesonpep517.metadata]