chore(deps): update dependency ovos-plugin-manager to v2 (#16)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

requirements.txt

@@ -1 +1 @@
-ovos-plugin-manager>=1.0.0,<2.0.0
+ovos-plugin-manager>=2.1.0,<2.2.0