Add requirements.txt

Several dependency versions needed downgrading from the latest due to
breaking changes. Add a requirements file for the time being.

requirements.txt

@@ -0,0 +1,29 @@
+aiofiles==0.7.0
+aiohttp==3.7.4.post0
+async-timeout==3.0.1
+attrs==21.2.0
+certifi==2021.5.30
+cffi==1.14.6
+chardet==4.0.0
+charset-normalizer==2.0.4
+httptools==0.2.0
+idna==3.2
+Jinja2==3.0.1
+MarkupSafe==2.0.1
+multidict==5.1.0
+pycparser==2.20
+pyttsx3==2.90
+requests==2.26.0
+sanic==21.3.4
+Sanic-Cors==1.0.0
+sanic-plugin-toolkit==1.0.1
+sanic-routing==0.7.1
+setproctitle==1.2.2
+sounddevice==0.4.2
+syncer==1.3.0
+typing-extensions==3.10.0.0
+ujson==4.0.2
+urllib3==1.26.6
+uvloop==0.15.3
+websockets==8.1
+yarl==1.6.3