Nested-pandas query does not handle scientific notation

[dougbrn]

Bug report
The following code block fails in nested_pandas, but succeeds in pandas.

from nested_pandas import NestedFrame
base = NestedFrame({"a":[1,2,3]}, index=[0,1,2])
base.query("a > 1e-1")

The query parsing code most likely tries to read the "e" as a column name and splits it apart, we should add additional handling for this.

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