DEPS: drop matplotlib < 1.4.3 · Issue #15543 · pandas-dev/pandas (original) (raw)
xref #15540
so we are technically still testing 1.3.1 (numpy 1.8.2).
But this should be reasonable to officially drop support for these older versions.
xref to #15206 (drop numpy < 1.10)
though mpl 1.4.3 is build on numpy 1.9