Custom suggestions component and custom id and name keys

[tjphopkins]

I would like to add a few features to this library. Would you accept a PR with the following?:

Custom id and name keys:

• Prop for custom suggestions id key
• Prop for custom suggestions name key (I believe this relates to issue label key instead of name constant #111)

e.g. to enable one to pass in a list of suggestions of the form:
{thisIdKey: , thisnameKey: } with customIdKey='thisIdKey' and customNameKey=thisNameKey.

Currently you have to process your suggestions before passing them in as a prop, which has unnecessary performance implications.

Custom suggestions component prop, in the same vein as the tagComponent prop

Many thanks

[i-like-robots]

Added in #124

[designbyadrian]

Where did this go?

[i-like-robots]

@designbyadrian this feature was added to v6 which you can try out here: https://github.com/i-like-robots/react-tags/tree/6.0

[designbyadrian]

@i-like-robots Silly me! Being ignorant, I assumed the pull request for V6 in 2018 was the current version 😄 I shall try out the new version!