Drop pify

[sibiraj-s]

Drop pify in favour of util.promisify

Following up from forwardemail/email-templates#409.

[sibiraj-s]

@niftylettuce. tracking email-templates package's dependencies and trying to reduce its install size.

Since node 8 is no longer in LTS. If it is okay drop that and by looking at the code we no longer will need babel. and also we can update someother dependencies as well. which can potentially reduce the size of the package. If you are okay with doing a major release I can make changes here as well as to the email-templates package?

Thoughts?

[niftylettuce]

yes you can drop Node 8 @sibiraj-s

[sibiraj-s]

@niftylettuce I have made the changes. didn't update few things since there are other PR's around that. I will do a total dependency bump PR once other PR's related to dependencies are merged.

[niftylettuce]

v3.0.0 released https://github.com/forwardemail/preview-email/releases/tag/v3.0.0

[sibiraj-s]

@niftylettuce with 3.0 there is a 3MB drop in install size.

[niftylettuce]

thank you @sibiraj-s - I'm also updating this in email-templates right now and bumping that to v8.0.0

[sibiraj-s]

Great.