Upgrade to 1.84, switch to resolver 3, and upgrade packages

.github/workflows/release.yml

@@ -9,7 +9,7 @@ jobs:
   build:
     strategy:
       matrix:
-        rust-toolchain: ["1.83"]
+        rust-toolchain: ["1.84"]
         os: [ubuntu-24.04, macos-14, windows-2022]
         arch: [amd64, arm64]
         exclude:

.github/workflows/test.yml

@@ -20,7 +20,7 @@ jobs:
       with:
         submodules: true
     - name: Install Rust
-      run: rustup update --no-self-update 1.83 && rustup default 1.83
+      run: rustup update --no-self-update 1.84 && rustup default 1.84
       shell: bash
     - name: Add wasm32-wasip1 Rust target
       run: rustup target add wasm32-wasip1
@@ -89,7 +89,7 @@ jobs:
         with:
           submodules: true
       - name: Install Rust
-        run: rustup update 1.83 && rustup default 1.83
+        run: rustup update 1.84 && rustup default 1.84
         shell: bash
       - name: Check crates can be published
         run: make package-check