add publish workflow

.github/workflows/publish.yml

@@ -0,0 +1,26 @@
+name: Publish
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  check:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Install rust stable
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          override: true
+      - name: publish
+        uses: actions-rs/cargo@v1
+        with:
+          command: publish
+          args: --dry-run

Cargo.toml

@@ -91,7 +91,7 @@ torut = { version = "~0.1.6", features = ["v2", "v3"] }
 zmq = { version = "~0.9", features = ["vendored"] }
 
 [target.'cfg(target_os="ios")'.dependencies]
-zeromq-src = { git = "https://github.com/LNP-BP/zeromq-src-rs", branch = "fix/cmake" }
+zeromq-src = { version = "~0.1", git = "https://github.com/LNP-BP/zeromq-src-rs", branch = "fix/cmake" }
 
 [target.'cfg(target_os="windows")'.dependencies]
 openssl = { features = ["vendored"] }