Update pynacl requirement from <1.5,>=1.3.0 to >=1.3.0,<1.6

Updates the requirements on [pynacl](https://github.com/pyca/pynacl) to permit the latest version.
- [Release notes](https://github.com/pyca/pynacl/releases)
- [Changelog](https://github.com/pyca/pynacl/blob/main/CHANGELOG.rst)
- [Commits](pyca/pynacl@1.3.0...1.5.0)

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

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

Author: dependabot[bot]

setup.py

@@ -41,7 +41,7 @@
     readme = f.read()
 
 extras_require = {
-    "voice": ["PyNaCl>=1.3.0,<1.5"],
+    "voice": ["PyNaCl>=1.3.0,<1.6"],
     "docs": [
         "sphinx==4.3.2",
         "sphinxcontrib_trio==1.1.2",