build.yml fix to avoid XeprAPI numpy int error

.github/workflows/build.yml

@@ -19,7 +19,9 @@ jobs:
       run: |
         python -m pip install --upgrade pip
         pip install pytest pytest-cov pycodestyle
-        pip install -r requirements.txt
+        pip install numpy
+        pip install git+https://github.com/OE-FET/XeprAPI
+        pip install Py-BOBYQA
 
     - name: Install esrpoise
       run: |