Add pydantic to test script

.travis.yml

@@ -17,7 +17,7 @@ before_install:
   - conda info -a
 install:
   - conda config --add channels conda-forge
-  - conda create -q -n test-environment python=$TRAVIS_PYTHON_VERSION obspy pycurl black pytest pytest-cov webtest
+  - conda create -q -n test-environment python=$TRAVIS_PYTHON_VERSION obspy pycurl black pytest pytest-cov webtest pydantic
   - source activate test-environment
   - pip install authlib flask flask-login flask-migrate flask-session flask-sqlalchemy psycopg2-binary
 script: