Update readme/changelog

CHANGELOG.txt

@@ -1,6 +1,7 @@
-v8.0.0 (2021-??-??)
+v8.0.0 (2022-??-??)
 -------------------
 [new] Add table.rows.clear() method to allow for chunking updates ([#1094](https://github.com/tediousjs/node-mssql/pull/1094))
+[new] Add valueHandler map to store callbacks that are used to process row values ([#1356](https://github.com/tediousjs/node-mssql/pull/1356))
 [change] msnodesqlv8 driver detects os platform and attempts to pick correct connections string for it ((#1318)[https://github.com/tediousjs/node-mssql/pull/1318])
 [change] Updated to latest Tedious 14 ((#1312)[https://github.com/tediousjs/node-mssql/pull/1312])
 [change] Errors for bad bulk load parameters have slightly different error messages ((#1318)[https://github.com/tediousjs/node-mssql/pull/1318])

README.md

@@ -512,6 +512,23 @@ async function example() {
 
 Similar to the global connection pool, you should aim to only close a pool when you know it will never be needed by the application again. Typically this will only be when your application is shutting down.
 
+### Result value manipulation
+
+In some instances it is desirable to manipulate the record data as it is returned from the database, this may be to cast it as a particular object (eg: `moment` object instead of `Date`) or similar.
+
+In v8.0.0+ it is possible to register per-datatype handlers:
+
+```js
+const sql = require('mssql')
+
+// in this example all integer values will return 1 more than their actual value in the database
+sql.valueHandler.set(sql.TYPES.Int, (value) => value + 1)
+
+sql.query('SELECT * FROM [example]').then((result) => {
+  // all `int` columns will return a manipulated value as per the callback above
+})
+```
+
 ## Configuration
 
 The following is an example configuration object: