update readme

Suchita Doshi · Suchita Doshi · commit cf6b20974d4b · 2019-12-22T19:08:32.000-08:00
diff --git a/README.md b/README.md
@@ -1 +1,2 @@
 # ember-tracked-properties-codemod
+Convert to `@tracked`

Original file line number	Diff line number	Diff line change
`@@ -1 +1,2 @@`
`1`	`1`	`# ember-tracked-properties-codemod`
	`2`	+Convert to `@tracked`