added back valgrind on CI

Author: iliabylich

.github/workflows/test.yml

@@ -23,14 +23,14 @@ jobs:
       fail-fast: false
       matrix:
         build:
-          # - os: ubuntu-latest
-          #   target: x86_64-unknown-linux-gnu
-          #   cc: clang-9
-          #   cxx: clang++-9
-          #   ld: ld.lld-9
-          #   cargoflags: --features="generate-bindings,onig"
-          #   name: valgrind
-          #   run: make clean test-valgrind
+          - os: ubuntu-latest
+            target: x86_64-unknown-linux-gnu
+            cc: clang-9
+            cxx: clang++-9
+            ld: ld.lld-9
+            cargoflags: --features="generate-bindings,onig"
+            name: valgrind
+            run: make clean test-valgrind
 
           - os: ubuntu-latest
             target: x86_64-unknown-linux-gnu