Updated requirements

Author: Chilipp

docs/requirements.txt

@@ -1,3 +1,3 @@
 # Sphinx
 #   https://github.com/sphinx-doc/sphinx/blob/master/CHANGES
-sphinx==1.6.3 # rq.filter: >=1.3, <1.7
+sphinx==1.7.2 # rq.filter: >=1.3, <1.8

requirements.txt

@@ -4,7 +4,7 @@ matplotlib==2.0.2  # rq.filter: >=1.4,<2.1
 
 # xarray
 #   https://github.com/pydata/xarray/blob/stable/doc/whats-new.rst
-xarray==0.9.6  # rq.filter: >=0.7.0,<1.0
+xarray==0.10.2  # rq.filter: >=0.7.0,<1.0
 
 # pandas
 #   http://pandas.pydata.org/pandas-docs/stable/whatsnew.html