gradient_bottom_navigation_bar 1.0.0+3

A material Bottom Navigation Bar with a linear gradient option.

[1.0.0+3] - 02/03/2019.

• Description updated with a better explanation.

[1.0.0+2] - 01/17/2019.

• Dartdoc generation fix.

[1.0.0+1] - 01/16/2019.

• Minor changes in docs.

[1.0.0] - 01/11/2019.

• Support for Linear Gradients.