fix typo

Author: jswhit

.github/workflows/build-wheels.yml

@@ -101,8 +101,8 @@ jobs:
         pip install virtualenv
     - name: Build and Install Wheels
       run: |
-        BUILD_DEPENDS="numpy==$NP_BUILD_DEP cython setuptools"
-        TEST_DEPENDS="numpy==$NP_TEST_DEP nose cython"
+        BUILD_DEPENDS="$NP_BUILD_DEP cython setuptools"
+        TEST_DEPENDS="$NP_TEST_DEP nose cython"
         source multibuild/common_utils.sh
         source multibuild/travis_steps.sh
         echo "------- BEFORE INSTALL --------"