BUG: support casting from bool array to EA Integer dtype

Fixes pandas-dev#25211. Cast boolean array to int before casting to EA Integer dtype.

Author: vladserkoff

pandas/core/arrays/integer.py

@@ -187,6 +187,9 @@ def coerce_to_array(values, dtype, mask=None, copy=False):
             raise TypeError("{} cannot be converted to an IntegerDtype".format(
                 values.dtype))
 
+    elif is_bool_dtype(values):
+        values = np.array(values, dtype=int, copy=copy)
+
     elif not (is_integer_dtype(values) or is_float_dtype(values)):
         raise TypeError("{} cannot be converted to an IntegerDtype".format(
             values.dtype))