python-pandas: update to version 0.21.0

Update the license and checksum to reflect the package

Signed-off-by: Derek Straka <derek@asterius.io>
Signed-off-by: Armin Kuster <akuster808@gmail.com>

meta-python/recipes-devtools/python/python-pandas_0.21.0.bb

@@ -0,0 +1,7 @@
+inherit setuptools
+require python-pandas.inc
+
+RDEPENDS_${PN} += " \
+    ${PYTHON_PN}-json \
+    ${PYTHON_PN}-importlib \
+"