go.mod release

[WhoSoup]

Version # proposal: v0.4.0 (currently we're at v0.3.6)

I added most of the sensible open PRs and issues to the the board. Most of these are ready to be reviewed but some still need more work, mainly the go.mod one.

There are two PRs that need special attention:

• Whitelist feature for wallet #135 The whitelist feature will also need a new release of factom-walletd (Whitelist support in the cli factom-walletd#85) to enable the feature for users
• Make raw data optional in API Requests #137 the optional raw-data feature will need the factomd api counterpart integrated

We should decide if we should include these now and they just aren't useful until their counterparts are enabled, or wait until integration is done on the other side and then make another release.

[PaulBernier]

Thanks for putting this together.
I propose we make all those PR against develop for now, that will be our working branch for the time being.
Having a quick look at those 2 features they don't seem to big, so I think it may be fine to include them right now.

[PaulBernier]

Also I suggest using 'squash and merge' when merging PRs

[PaulBernier]

Released