Add cargo doc check to CI (#332)

.github/workflows/rust.yml

@@ -43,6 +43,19 @@ jobs:
         with:
           command: fmt
           args: --all -- --check
+
+  doc:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          override: true
+      - uses: actions-rs/cargo@v1
+        with:
+          command: doc
+          args: --all-features --release
 
   clippy_all_features:
     runs-on: ubuntu-latest

crates/ibc/src/lib.rs

@@ -20,7 +20,7 @@
 //!
 //! The layout of this crate mirrors the classification of the [Interchain
 //! Standards][ics-standards]. The classification consists of [Core][core], [Clients][clients],
-//! [Applications][applications], and [Relayer][relayer].
+//! and [Applications][applications].
 //!
 //! `Core` consists of the designs and logic pertaining to the transport, authentication, and
 //! ordering layers of the IBC protocol, the fundamental pieces.