Check dependencies on macOS too

.github/workflows/check_dependencies.yml

@@ -2,7 +2,11 @@ name: Check Dependencies
 on: [push, pull_request]
 jobs:
   update-deps:
-    runs-on: ubuntu-20.04
+    strategy:
+      matrix:
+        os: [ubuntu-20.04, macos-latest]
+      fail-fast: true
+    runs-on: ${{ matrix.os }}
     if: "!contains(github.event.head_commit.message, '[ci skip]')"
     steps:
       - name: Install libraries
@@ -10,6 +14,13 @@ jobs:
           set -x
           sudo apt-get update -q || :
           sudo apt-get install --no-install-recommends -q -y build-essential libssl-dev libyaml-dev libreadline6-dev zlib1g-dev libncurses5-dev libffi-dev libgdbm-dev bison autoconf ruby
+        if: "contains(matrix.os, 'ubuntu')"
+      - name: Install libraries
+        run: |
+          export WAITS='5 60'
+          brew upgrade
+          brew install gdbm gmp libffi openssl@1.1 zlib autoconf automake libtool readline
+        if: "contains(matrix.os, 'macos')"
       - name: git config
         run: |
           git config --global advice.detachedHead 0