Editorial: Call out browser versions for new features (#321)

Editorial: Call out browser versions for new features

* IDBFactory databases()
* IDBCursor request
* IDBTransaction durability
* IDBTransaction commit()

Author: inexorabletash

index.bs

@@ -2407,6 +2407,7 @@ when invoked, must run these steps:
 <aside class=advisement>
   &#x1F6A7;
   The {{IDBFactory/databases()}} method is new in this edition.
+  It is supported in Chrome 71 and Edge 79.
   &#x1F6A7;
 </aside>
 
@@ -2717,6 +2718,7 @@ The <dfn method for=IDBDatabase>transaction(|storeNames|, |mode|, |options|)</df
 <aside class=advisement>
   &#x1F6A7;
   The {{IDBTransactionOptions/durability}} option is new in this edition.
+  It is supported in Chrome 82 and Edge 82.
   &#x1F6A7;
 </aside>
 
@@ -4425,6 +4427,7 @@ return **this**'s [=cursor/request=].
 <aside class=advisement>
   &#x1F6A7;
   The {{IDBCursor/request}} attribute is new in this edition.
+  It is supported in Chrome 76 and Edge 79.
   &#x1F6A7;
 </aside>
 
@@ -4897,6 +4900,7 @@ The <dfn attribute for=IDBTransaction>durability</dfn> attribute's getter must r
 <aside class=advisement>
   &#x1F6A7;
   The {{IDBTransaction/durability}} attribute is new in this edition.
+  It is supported in Chrome 82 and Edge 82.
   &#x1F6A7;
 </aside>
 
@@ -5006,6 +5010,8 @@ must run these steps:
 <aside class=advisement>
   &#x1F6A7;
   The {{IDBTransaction/commit()}} method is new in this edition.
+  It is supported in Chrome 76, Edge 79, and Firefox 74.
+
   &#x1F6A7;
 </aside>