Simplify python3 install in ci

.github/workflows/run-tests.yml

@@ -35,11 +35,11 @@ jobs:
       run: |
         echo "::set-output name=dir::$(pip cache dir)"
 
-    - name: Cache trinity libs
+    - name: Cache dependencies
       uses: actions/cache@v2
-      id: cache-libs
+      id: cache-deps
       env:
-        cache-name: cache-trinity-libs-and-python-modules
+        cache-name: cache-deps
       with:
         key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
         path: |
@@ -51,11 +51,11 @@ jobs:
           ${{ runner.os }}-${{ env.cache-name }}-
           ${{ runner.os }}-
 
-    - name: Compile Capstone/Keystone/Unicorn and install Python modules
-      if: steps.cache-libs.outputs.cache-hit != 'true'
+    - name: Install Python modules (Capstone, Keystone, Unicorn, Ropper)
+      if: steps.cache-deps.outputs.cache-hit != 'true'
       run: |
         mkdir -p ~/.cache/pip || echo ok
-        python3 -c 'import capstone, keystone, unicorn' || python3 -m pip install --user --upgrade -r ./requirements.txt
+        python3 -m pip install --user --upgrade -r ./requirements.txt
 
     - name: Setup GEF
       run: |