[CI] Add Clang 13.0 to the build matrix.

Author: vyazelenko

.github/workflows/ci.yml

@@ -138,7 +138,7 @@ jobs:
  strategy:
  fail-fast: false
  matrix:
- version: [ '6.0', '7', '8', '9', '10', '11', '12' ]
+ version: [ '6.0', '7', '8', '9', '10', '11', '12', '13' ]
  env:
  CC: clang-${{ matrix.version }}
  CXX: clang++-${{ matrix.version }}