Reduce CI time

By only running the test suite on `--all-features` and instead checking
the powerset, the amount of time taken to run the CI suite should be
significantly reduced.

Included in this commit is a trivial change to silence a lint on older
compilers.

.github/workflows/build.yaml

@@ -98,11 +98,10 @@ jobs:
           override: true
 
       - name: Install cargo-web
-        # uses: actions-rs/install@v0.1
-        # with:
-        #   crate: cargo-web
-        #   version: ^0.6
-        #   use-tool-cache: true
+        uses: actions-rs/install@v0.1
+        with:
+          crate: cargo-web
+          use-tool-cache: true
         run: cargo +stable install cargo-web
         if: steps.cache.outputs.cache-hit != 'true'
 
@@ -187,17 +186,22 @@ jobs:
             target
           key: ${{ runner.os }}-cargo-${{ matrix.rust }}-${{ matrix.os }}-${{ hashFiles('**/Cargo.toml') }}2
 
-      - name: Test feature powerset (--tests)
+      # For speed reasons, it's worth it to just check the feature powerset and
+      # test with everything enabled. As features are additive, the tests ensure
+      # that everything works, while the checking ensures any combination would
+      # compile without issue.
+
+      - name: Check feature powerset
         uses: actions-rs/cargo@v1
         with:
           command: hack
-          args: test --feature-powerset --optional-deps --skip default,libc,winapi,stdweb --tests
+          args: check --feature-powerset --optional-deps --skip default,libc,winapi,stdweb
 
-      - name: Test documentation
+      - name: Test (--all-features)
         uses: actions-rs/cargo@v1
         with:
           command: test
-          args: --all-features --doc
+          args: --all-features
 
   fmt:
     name: Formatting

time-macros-impl/src/error.rs

@@ -11,8 +11,8 @@ pub(crate) enum Error {
     Custom(String),
 }
 
+#[allow(clippy::use_self)]
 impl fmt::Display for Error {
-    #[allow(clippy::use_self)]
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         match self {
             Error::MissingComponent { name } => write!(f, "missing component: {}", name),