chore: bump version to 0.2.0 (fixes #16)

[Alex-Wengg]

Summary

Closes #16 — tn_normalize_sentence (and a lot of other public API) is missing from the published crate because crates.io still has 0.1.0, which was cut from commit 699a68c (2026-03-07).

Since then, ~49 commits of feature work have landed on main without a release, including:

• pub fn tn_normalize_sentence + full TN (written → spoken) support
• Multi-language ITN for FR, DE, ES, HI, JA, ZH
• Module rename from asr/tts to itn/tn
• JavaScript-callable wasm bindings

Users running cargo add text-processing-rs and trying to import tn_normalize_sentence hit unresolved import because that function only exists post-0.1.0.

Changes

• Bump Cargo.toml from 0.1.0 → 0.2.0
• Bump Cargo.lock to match
• Bump package.json (npm wasm package) to match

Picking 0.2.0 over 0.1.1 because the breadth of new public surface (multi-language ITN, full TN API, wasm bindings) is well beyond a patch-level change.

Follow-up needed

After merge, a maintainer needs to:

• Tag v0.2.0
• cargo publish
• Optionally npm publish the wasm package

Test plan

• CI passes
• Reproduce reporter's snippet against main:

  use text_processing_rs::tn_normalize_sentence;
  fn main() { println!("{}", tn_normalize_sentence("I have twenty one apples.")); }

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