Fix focus shown in ant-design #10663

[zhujinxuan]

1. Fix input-number: focused style could not be removed after clicking up/down button and then outside ant-design/ant-design#10663; The problem is setSelection does not automatically focus the input element
2. Add eslint, let editor can fix styles and detect errors automatically.
3. Fix the cursor problem in increase; for example 9<cursor/> after increase will become 1<cursor/>0; In this PR, we will let setSelection happens when and only when the selection is expanded

[coveralls]

Coverage increased (+0.03%) to 92.377% when pulling 0c3ddcb on zhujinxuan:fix-focus into c094dd8 on react-component:master.