DEPS: Drop Python 3.4 support

Closes gh-15251.

Author: gfyoung

ci/requirements-3.4.build

@@ -14,7 +14,7 @@ html5lib
 jinja2
 sqlalchemy
 pymysql
-feather-format
+# feather-format (not available on defaults ATM)
 # psycopg2 (not avail on defaults ATM)
 beautifulsoup4
 s3fs

ci/requirements-3.4.pip

@@ -1,6 +1,6 @@
-python=3.4*
+python=3.6*
 python-dateutil
 pytz
 nomkl
-numpy=1.10*
+numpy
 cython

ci/requirements-3.4.run

@@ -0,0 +1,22 @@
+python-dateutil
+pytz
+numpy
+scipy
+openpyxl
+xlsxwriter
+xlrd
+xlwt
+numexpr
+pytables
+matplotlib
+lxml
+html5lib
+jinja2
+sqlalchemy
+pymysql
+# feather-format (not available on defaults ATM)
+# psycopg2 (not available on defaults ATM)
+beautifulsoup4
+s3fs
+xarray
+ipython

ci/requirements-3.4_SLOW.run

@@ -23,9 +23,9 @@ dependencies:
        0)
          sudo apt-get install language-pack-it && ./ci/install_circle.sh JOB="2.7_COMPAT" LOCALE_OVERRIDE="it_IT.UTF-8" ;;
        1)
-         sudo apt-get install language-pack-zh-hans && ./ci/install_circle.sh JOB="3.4_SLOW" LOCALE_OVERRIDE="zh_CN.UTF-8" ;;
+         sudo apt-get install language-pack-zh-hans && ./ci/install_circle.sh JOB="3.6_SLOW" LOCALE_OVERRIDE="zh_CN.UTF-8" ;;
        2)
-         sudo apt-get install language-pack-zh-hans && ./ci/install_circle.sh JOB="3.4" LOCALE_OVERRIDE="zh_CN.UTF-8" ;;
+         sudo apt-get install language-pack-zh-hans && ./ci/install_circle.sh JOB="3.6" LOCALE_OVERRIDE="zh_CN.UTF-8" ;;
        3)
          ./ci/install_circle.sh JOB="3.5_ASCII" LOCALE_OVERRIDE="C" ;;
       esac