GitHub Actions build (#2769)

Replace inactive TravisCI build with GitHub Actions - Maven Central
deployment will be implemented as a separate job

----
Resolves #2684

.github/workflows/build.yml

@@ -0,0 +1,23 @@
+name: build and test
+on:
+  push:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        java: [ '8', '11', '17' ]
+        architecture: [ 'x64' ]
+    name: Build with JDK ${{ matrix.java }} on ${{ matrix.architecture }}
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-java@v4
+        with:
+          distribution: 'temurin'
+          java-version: ${{ matrix.java }}
+          architecture: ${{ matrix.architecture }}
+          cache: 'gradle'
+      - uses: gradle/actions/setup-gradle@v3
+      - run: ./gradlew check --info --warning-mode all
+      - uses: codecov/codecov-action@v3

src/main/java/io/vavr/control/Validation.java

@@ -199,7 +199,7 @@ public static <E, T> Validation<Seq<E>, Seq<T>> sequence(Iterable<? extends Vali
 
     /**
      * A wrapper to {@link #all(Traversable)}.
-     * <p/>
+     * <p>
      * Usage example :
      *
      * <pre>{@code