Remove next and canary tags from README and quickstart

Author: jamesdaniels

README.md

@@ -29,13 +29,12 @@ available in
 
 ```bash
 # npm
-npm install reactfire@next
+npm install --save reactfire
+
 # yarn
-yarn add reactfire@next
+yarn add reactfire
 ```
 
-If you like living life on the edge, use `reactfire@canary`.
-
 ## Example use
 
 Check out the

docs/quickstart.md

@@ -19,12 +19,10 @@ cd myapp
 
 ```bash
 # yarn
-yarn add firebase reactfire@canary
-
-# or
+yarn add firebase reactfire
 
 # npm
-npm install firebase reactfire@canary
+npm install --save firebase reactfire
 ```
 
 ## 3. Create a document in Cloud Firestore