Adds a figure creation test

Author: palnabarun

mplaltair/tests/test_basic.py

@@ -1,3 +1,10 @@
+import matplotlib.pyplot as plt
+
 def test_import():
     import mplaltair
     del mplaltair
+
+def test_mpl_figure():
+    fig = plt.figure()
+    del fig
+