Pluralize filter for Tera engine

[oooo-ps]

Found this filter:
https://keats.github.io/tera/docs/#pluralize

but:

Filter call 'pluralize' failed

My Cargo.toml:

rocket = "0.5"
rocket_dyn_templates = { version = "0.2", features = ["tera"] }

[oooo-ps]

Sorry, the answer in just the next line :)

Filter pluralize was called on an incorrect value: got null but expected a f64