Update dependency ovos-plugin-manager to v2 (#37)

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

Author: renovate[bot]

requirements.txt

@@ -1,4 +1,4 @@
-ovos-plugin-manager>=0.0.22,<2.0.0
+ovos-plugin-manager>=2.1.0,<2.2.0
 ovos-utils>=0.0.32,<1.0.0
 ovos-bus-client>=0.0.3,<2.0.0
 dbus-next