DEPS: fix travis 37 locale (pandas-dev#34472)

Author: fangchenli

ci/deps/travis-37-locale.yaml

@@ -19,22 +19,22 @@ dependencies:
   - html5lib
   - ipython
   - jinja2
-  - lxml=3.8.0
+  - lxml=4.3.0
   - matplotlib=3.0.*
   - moto
   - nomkl
   - numexpr
   - numpy
   - openpyxl
   - pandas-gbq=0.12.0
-  - psycopg2=2.6.2
+  - psycopg2=2.7
   - pymysql=0.7.11
   - pytables
   - python-dateutil
   - pytz
   - scipy
-  - sqlalchemy=1.1.4
-  - xarray=0.10
+  - sqlalchemy=1.3.0
+  - xarray=0.12.0
   - xlrd
   - xlsxwriter
   - xlwt