feat: introduce API versioning support

If no version is set to a path then v1 is used by default.

closes #13

main.py

@@ -5,6 +5,7 @@ from aioredis import Channel, Redis
 from fastapi import Depends, FastAPI, Request
 from fastapi_plugins import (RedisSettings, depends_redis, get_config,
                              redis_plugin, registered_configuration)
+from fastapi_versioning import VersionedFastAPI
 from starlette import status
 
 from app.repositories.bitcoin import (register_bitcoin_info_gatherer,
@@ -31,6 +32,10 @@ app.include_router(lightning.router)
 app.include_router(system.router)
 app.include_router(setup.router)
 
+app = VersionedFastAPI(app,
+                       version_format='{major}',
+                       prefix_format='/v{major}')
+
 
 @app.on_event('startup')
 async def on_startup() -> None:

requirements.txt

@@ -1,5 +1,6 @@
 fastapi==0.65.2
 fastapi_plugins==0.8.1
+fastapi-versioning==0.9.1
 redis==3.5.3
 aioredis==1.3.1
 pydantic==1.8.2