Fix clippy failures with useless_vec

• Fixes incompatibilities with #![deny(clippy::all)] in d4dfefe
• Removes trailing whitespace in ts-rs/src/lib.rs in 93f786f
• Resolves frog-pond/ccc-server-next#83

Beta clippy recently started failing on a downstream consumer (issue) of this crate. This was because of a number of calls to vec! that were picked up by clippy. This lint only fires, at time of writing, in beta (stable does not have the change that introduced it, and nightly has since changed to ignore this lint in macros).