build: add fastapi-i18n as dependency

Author: matthiasschaub

poetry.lock

@@ -46,6 +46,7 @@ plotly = "^5.16.1"
 psycopg = {extras = ["binary"], version = "^3.1"}
 async-lru = "^2.0.4"
 approvaltests = "^12.1.0"
+fastapi-i18n = {git = "https://gitlab.heigit.org/mschaub/fastapi-i18n.git"}
 
 [tool.poetry.dev-dependencies]
 pre-commit = "^3.2.1"