meilisearch: Trim whitespace from token

When reading the Meilisearch token from the file specified in the
configuration, we need to ensure any whitespace are trimmed from the
string.  If the token file was created with a text editor, or even a
shell pipeline, it's likely to have a trailing newline character.  If we
do not remove this, authenticated requests to Meilisearch will fail.

src/meilisearch.rs

@@ -20,7 +20,7 @@ impl TryFrom<&Config> for Client {
             Some(t) => Some(std::fs::read_to_string(t).map_err(Error::Token)?),
             None => None,
         };
-        Ok(Client::new(&config.meilisearch.url, token)?)
+        Ok(Client::new(&config.meilisearch.url, token.as_deref().map(str::trim))?)
     }
 }