Install newer version of CMake for U18.

Author: john-michaelburke

.github/workflows/main.yml

@@ -69,6 +69,16 @@ jobs:
               choco install -y capnproto
           fi
 
+      - name: Install CMake for U18
+        run: |
+          sudo apt purge --auto-remove cmake
+          wget -O - https://apt.kitware.com/keys/kitware-archive-latest.asc 2>/dev/null \
+            | gpg --dearmor - | sudo tee /etc/apt/trusted.gpg.d/kitware.gpg >/dev/null
+          sudo apt-add-repository 'deb https://apt.kitware.com/ubuntu/ bionic main'
+          sudo apt update
+          sudo apt install cmake
+        if: runner.os == 'Linux'
+
       - name: Pull Git LFS objects
         run: git lfs pull
         env:
@@ -160,6 +170,16 @@ jobs:
         run: |
           sudo apt-get update && sudo apt-get install -y capnproto libudev-dev libssl-dev
 
+      - name: Install CMake for U18
+        run: |
+          sudo apt purge --auto-remove cmake
+          wget -O - https://apt.kitware.com/keys/kitware-archive-latest.asc 2>/dev/null \
+            | gpg --dearmor - | sudo tee /etc/apt/trusted.gpg.d/kitware.gpg >/dev/null
+          sudo apt-add-repository 'deb https://apt.kitware.com/ubuntu/ bionic main'
+          sudo apt update
+          sudo apt install cmake
+        if: runner.os == 'Linux'
+
       - name: Cache pip
         uses: actions/cache@v2
         with:
@@ -262,6 +282,16 @@ jobs:
               choco install capnproto nsis
           fi
 
+      - name: Install CMake for U18
+        run: |
+          sudo apt purge --auto-remove cmake
+          wget -O - https://apt.kitware.com/keys/kitware-archive-latest.asc 2>/dev/null \
+            | gpg --dearmor - | sudo tee /etc/apt/trusted.gpg.d/kitware.gpg >/dev/null
+          sudo apt-add-repository 'deb https://apt.kitware.com/ubuntu/ bionic main'
+          sudo apt update
+          sudo apt install cmake
+        if: runner.os == 'Linux'
+
       - name: Install stable Rust
         uses: actions-rs/toolchain@v1
         with: