Update CI to GCC/Clang 11

.github/workflows/build.yml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        cxx: [g++-9, clang++-9]
+        cxx: [g++-11, clang++-11]
     steps:
     - uses: actions/checkout@v1
     - name: cmake
@@ -103,7 +103,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        cxx: [g++-9, clang++-9]
+        cxx: [g++-11, clang++-11]
     steps:
     - uses: actions/checkout@v1
     - name: cmake
@@ -119,7 +119,7 @@ jobs:
     - name: test
       working-directory: tests
       run: bash JavaTest.sh
-  
+
   build-kotlin:
     name: Build Kotlin
     runs-on: macos-latest
@@ -127,13 +127,13 @@ jobs:
     - name: Checkout
       uses: actions/checkout@v1
     - name: Build
-      working-directory: kotlin  
+      working-directory: kotlin
       run: ./gradlew clean build allTests
     - name: Run Benchmark
-      working-directory: kotlin  
+      working-directory: kotlin
       run: ./gradlew benchmark
     - name: Generate Benchmark Report
-      working-directory: kotlin  
+      working-directory: kotlin
       run: |
         ./gradlew jmhReport;
         mv benchmark/build/reports/benchmarks/main/* benchmark_latest