Bump version to 0.1.6 and use trusted publishing via OIDC

Use rust-lang/crates-io-auth-action to exchange OIDC token for
crates.io publish credentials. No API token secret needed.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: lightsofapollo

.github/workflows/publish.yml

@@ -11,10 +11,12 @@ jobs:
   publish:
     runs-on: ubuntu-latest
     environment: crates-io
+    permissions:
+      id-token: write
+      contents: read
     steps:
       - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@stable
       - uses: Swatinem/rust-cache@v2
+      - uses: rust-lang/crates-io-auth-action@v1
       - run: cargo publish
-        env:
-          CARGO_REGISTRY_TOKEN: ${{ secrets.CARGO_REGISTRY_TOKEN }}

Cargo.lock

@@ -1,6 +1,6 @@
 [package]
 name = "openapi-to-rust"
-version = "0.1.5"
+version = "0.1.6"
 edition = "2024"
 rust-version = "1.85.0"
 authors = ["James Lalonde"]