editors 0.0.2+4

Simple Flutter Editors including StringEditor, IntEditor, EnumEditor, BoolEditor

[0.0.2+4] - 3/15/2020.

• minor fix in EnumEditor

[0.0.2+3] - 3/15/2020.

• minor fix in EnumEditor

[0.0.2+2] - 3/15/2020.

• minor update in EnumEditor lable

[0.0.2+1] - 3/15/2020.

• move demo_items to separate repo, minor update in EnumEditor lable, minor update excmple

[0.0.2] - 3/15/2020.

• Implement editors for string, int, bool, enum values

[0.0.1] - 3/10/2020.

• Starting development