DOC: Add numpy version constraint to README

README.md

@@ -33,7 +33,7 @@ More information and documentation can be found at https://tedana.readthedocs.io
 You'll need to set up a working development environment to use `tedana`.
 To set up a local environment, you will need Python >=3.5 and the following packages will need to be installed:
 
-* [numpy](http://www.numpy.org/)
+* [numpy>=1.14](http://www.numpy.org/)
 * [scipy](https://www.scipy.org/)
 * [scikit-learn](http://scikit-learn.org/stable/)
 * [nilearn](https://nilearn.github.io/)