Update dependency backoff to v2

Renovate Bot · Renovate Bot · commit 02ce18349170 · 2022-07-01T13:03:56.000Z
diff --git a/pyproject.toml b/pyproject.toml
@@ -31,7 +31,7 @@ bs4 = "^0.0.1"
 lxml = "^4.6.2"
 geopy = "^2.1.0"
 tzwhere = "^3.0.3"
-backoff = "^1.11.1"
+backoff = "^2.0.0"
 
 [tool.poetry.dev-dependencies]
 pytest = "^7.0.0"
