publish 2.2.0

Author: hoc081098

CHANGELOG.md

@@ -1,11 +1,15 @@
+## 2.2.0 - May 1, 2021
+
+-   Stable release for null safety.
+
 ## 2.2.0-nullsafety.2 - Feb 9, 2021
 -   Add `Selector`s: `select`, `select2`, ..., `select9` and `selectMany`.
     -   Selectors can compute derived data, allowing Redux to store the minimal possible state.
     -   Selectors are efficient. A selector is not recomputed unless one of its arguments changes.
     -   When using the `select`, `select2` to `select9`, `selectMany` functions, 
         keeps track of the latest arguments in which your selector function was invoked. 
         Because selectors are pure functions, the last result can be returned 
-        when the arguments match without reinvoking your selector function. 
+        when the arguments match without re-invoking your selector function. 
         This can provide performance benefits, particularly with selectors that perform expensive computation. 
         This practice is known as memoization.