DatePickerRange : Date is not cleared with clearable=True

[Sandy-T]

dash 1.1.0
dash-core-components 1.1.0

[byronz]

reproduced with the following code, the root cause was the x button only clears the state, but not the props.

import dash
from dash.dependencies import Input, Output
import dash_table
import dash_core_components as dcc
import dash_html_components as html


app = dash.Dash(__name__)

app.layout = html.Div([dcc.DatePickerRange(id="date", clearable=True)])

if __name__ == "__main__":
    app.run_server(debug=True)