Update Selftest workflow file

.github/workflows/cmake.yml

@@ -1,4 +1,4 @@
-name: CMake
+name: Selftest
 
 on: [push]
 
@@ -17,6 +17,9 @@ jobs:
     steps:
     - uses: actions/checkout@v2
 
+    - name: Install libcurl (used for Central API)
+      run: sudo apt-get install libcurl3 -y
+
     - name: Checkout submodules
       run: git submodule update --init
 
@@ -30,8 +33,8 @@ jobs:
       # access regardless of the host operating system
       shell: bash
       working-directory: ${{github.workspace}}/build
-      # Note the current convention is to use the -S and -B options here to specify source 
-      # and build directories, but this is only available with CMake 3.13 and higher.  
+      # Note the current convention is to use the -S and -B options here to specify source
+      # and build directories, but this is only available with CMake 3.13 and higher.
       # The CMake binaries on the Github Actions machines are (as of this writing) 3.12
       run: cmake $GITHUB_WORKSPACE -DCMAKE_BUILD_TYPE=$BUILD_TYPE
 
@@ -44,6 +47,6 @@ jobs:
     - name: Test
       working-directory: ${{github.workspace}}/build
       shell: bash
-      # Execute tests defined by the CMake configuration.  
+      # Execute tests defined by the CMake configuration.
       # See https://cmake.org/cmake/help/latest/manual/ctest.1.html for more detail
       run: ctest -C $BUILD_TYPE