v1.8.4: fix peerDependencies (#4)

* set rxjs as peerDependency

* update version

* fix package.json

* fix peerDependencies

v1.8.3: fix package.json (#3)

* set rxjs as peerDependency

* update version

* fix package.json

v1.8.2: set rxjs as peerDependency (#2)

* set rxjs as peerDependency

* update version