Merge pull request #41 from NREL/github_actions_patch

Update deprecated Ubuntu workflow

.github/workflows/ci.yml

@@ -5,61 +5,8 @@ on:
   pull_request:
 
 jobs:
-  build-on-ubuntu1804:
-    runs-on: ubuntu-18.04
-    env:
-      RUNS_ON: ubuntu1804
-    steps:
-    - name: Setup cmake
-      uses: jwlawson/actions-setup-cmake@v1.12
-      with:
-        cmake-version: '3.24.x'
-    - name: Test cmake version
-      run: cmake --version
-    - name: Install OS dependencies
-      run: |
-        sudo apt-get update
-        sudo apt-get install -y \
-          build-essential \
-          freeglut3-dev \
-          g++ \
-          libcurl4-openssl-dev \
-          libfontconfig-dev \
-          libgl1-mesa-dev \
-          libgtk2.0-dev \
-          mesa-common-dev \
-          unzip
-    - name: Get GCC version
-      run: gcc --version
-    - name: Get libc version
-      run: ldd --version
-
-    - name: Install wxWidgets
-      run: |
-        sudo apt-get install -y libwxgtk*-dev
-        sudo ln -s $(which wx-config) /usr/local/bin/wx-config-3
-        wx-config-3 --cflags | grep I
-
-    - name: Checkout
-      uses: actions/checkout@v2
-
-    - name: Build LK
-      run: |
-        cmake -Bbuild_linux -DCMAKE_BUILD_TYPE=Debug
-        cmake --build build_linux -- -j
-
-    - name: Save static lib & lksandbox
-      uses: actions/upload-artifact@v2
-      with:
-        name: LK-${{ env.RUNS_ON }}-x86_64
-        path: |
-          build_linux/lk_sandbox*
-          build_linux/lk*.a
-
-  build-on-ubuntu2004:
-    runs-on: ubuntu-20.04
-    env:
-      RUNS_ON: ubuntu2004
+  build-on-ubuntu:
+    runs-on: ubuntu-latest
     steps:
     - name: Setup cmake
       uses: jwlawson/actions-setup-cmake@v1.12