Merge pull request #152 from furbrain/main

Add async buzzer module

Author: jposada202020

.gitmodules

@@ -302,3 +302,6 @@
 [submodule "libraries/drivers/BMI160"]
 	path = libraries/drivers/BMI160
 	url = https://github.com/jposada202020/CircuitPython_BMI160.git
+[submodule "libraries/helpers/async_buzzer"]
+	path = libraries/helpers/async_buzzer
+	url = https://github.com/furbrain/CircuitPython_async_buzzer.git

circuitpython_community_library_list.md

@@ -61,6 +61,7 @@ Here is a listing of current CircuitPython Community Libraries. These libraries
 * [CircuitPython ArrowLine](https://github.com/jposada202020/CircuitPython_ArrowLine.git) Utility function to draw arrow lines using vectorio and DisplayIO ([PyPi](https://pypi.org/project/circuitpython-ArrowLine))  \([Docs](https://circuitpython-arrowline.readthedocs.io/))
 * [CircuitPython_async](https://github.com/WarriorOfWire/CircuitPython_async.git) Pure Python cooperative multitasking implementation for the async/await language syntax
 * [CircuitPython_async_button](https://github.com/furbrain/CircuitPython_async_button.git) async implementation of a button - allows detection of single, double and triple clicks \[Docs](https://circuitpython-async-button.readthedocs.io/en/latest/))
+* [CircuitPython_async_buzzer](https://github.com/furbrain/CircuitPython_async_buzzer.git) Utility to play simple tunes via pwmio asynchronously \[Docs](https://circuitpython-async-buzzer.readthedocs.io/en/latest/))
 * [CircuitPython AzureCustomVision Prediction](https://github.com/jimbobbennett/CircuitPython_AzureCustomVision_Prediction) CircuitPython prediction library for the Azure custom vision service ([PyPi](https://pypi.org/project/circuitpython-azurecustomvision-prediction)) \([Docs](https://circuitpython.readthedocs.io/projects/circuitpython_azurecustomvision_prediction/en/latest/))
 * [CircuitPython Base64](https://github.com/jimbobbennett/CircuitPython_Base64) RFC 3548: Base16, Base32, Base64 Data Encodings ([PyPi](https://pypi.org/project/circuitpython-base64)) \([Docs](https://circuitpython.readthedocs.io/projects/base64/en/latest/))
 * [CircuitPython Boxplot](https://github.com/jposada202020/CircuitPython_uboxplot) Helps calculate and graphs boxplots ([PyPi](https://pypi.org/project/circuitpython-uboxplot/)) \([Docs](https://circuitpython-uboxplot.readthedocs.io/en/latest/))