updates doc

Author: chrvadala

README.md

@@ -118,12 +118,15 @@ It leverages on Bluez driver, a component supported by the following platforms a
 - **1.6** - Upgrades deps and removes some dependencies; migrates to npm; improves gh-actions
 - **1.7** - Fixes compatibility issue [#30](https://github.com/chrvadala/node-ble/issues/30); Adds JSdoc; Deprecates NodeJS 10 and 12; Upgrades deps;
 - **1.8** - Upgrades deps and gh-actions os; Adds `Bluetooth.activeAdapters()` func [#45](https://github.com/chrvadala/node-ble/pull/45); 
+- **1.9** - Upgrades deps; Adds `writeValueWithoutResponse()` and `writeValueWithResponse` methods [#47](https://github.com/chrvadala/node-ble/pull/47); Improves typescript definition [#48](https://github.com/chrvadala/node-ble/pull/48) 
 
 # Contributors
 - [chrvadala](https://github.com/chrvadala) (author)
 - [pascalopitz](https://github.com/pascalopitz)
 - [lupol](https://github.com/lupol)
 - [altaircunhajr](https://github.com/altaircunhajr)
+- [derwehr](https://github.com/derwehr)
+- [mxc42](https://github.com/mxc42)
 
 # References
 - https://git.kernel.org/pub/scm/bluetooth/bluez.git/tree/doc/adapter-api.txt