Update pyexiv2 requirement from <2.15,>=2.12.0 to >=2.12.0,<2.16

Updates the requirements on [pyexiv2](https://github.com/LeoHsiao1/pyexiv2) to permit the latest version.
- [Release notes](https://github.com/LeoHsiao1/pyexiv2/releases)
- [Commits](LeoHsiao1/pyexiv2@v2.12.0...v2.15.3)

---
updated-dependencies:
- dependency-name: pyexiv2
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>

setup.py

@@ -103,7 +103,7 @@
     # setup_requires=["setuptools_scm"],
     install_requires=install_requires,
     extras_require={
-        "exiv2": ["pyexiv2>=2.12.0,<2.15"],
+        "exiv2": ["pyexiv2>=2.12.0,<2.16"],
     },
     python_requires=">=3.8",
     classifiers=[