Update deps, require node 8

[bendrucker]

This would require a major version bump, which I think we should be doing anyway as numeric/binary oriented changes have been piling up in master. @brianc are you ok with going ahead with a major release of node-postgres as well? Node 4's EOL was about 1.5 years ago. 8's is coming up (December).

Closes #104

[charmander]

Breaking changes also worth considering for a major release:

• integer types as BigInt instead of string for much better type safety (requires Node 10, so maybe not if this is targeted at Node 8) (#78)

• no Date conversion for date and (maybe?) timestamp without time zone (#50, #81)

• removal of lib/arrayParser.js

[bendrucker]

I think we should just get a major release out and evaluate dates and big ints for a later major. We haven't been doing many of these releases. Removing lib/arrayParser.js seems easy/uncontroversial.

@brianc Thoughts on doing a major release for Node 8 and then doing a future major for Node 12 that incorporates BigInt + Date changes?

[brianc]

Thoughts on doing a major release for Node 8 and then doing a future major for Node 12 that incorporates BigInt + Date changes?

Yeah I'm down with that. You want a major bump in node-posgres core as well right? I can sweep in a couple other breaking changes we wanted to make too.

[bendrucker]

You want a major bump in node-posgres core as well right?

Yup, major bump here, and then a major bump in node-postgres updating the dep.

[codecov-io]

Codecov Report

Merging #105 into master will increase coverage by 0.6%. The diff coverage is n/a.

@@            Coverage Diff            @@
##           master     #105     +/-   ##
=========================================
+ Coverage   88.01%   88.62%   +0.6%     
=========================================
  Files           5        4      -1     
  Lines         217      211      -6     
=========================================
- Hits          191      187      -4     
+ Misses         26       24      -2

Impacted Files	Coverage Δ
index.js	75% <ø> (-2.28%)	:arrow_down:

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[bendrucker]

Finally took the time to merge this and release 3.0 to npm. Happy to take on further breaking changes in 4.0 which might be node 12+ assuming it comes early 2020.

@brianc Do you need any help landing other changes to node-postgres? If not I can just open the PR bumping the pg-types dep and setting engines.node.

[gajus]

What is the correct way to parse the array now?

This broke https://github.com/gajus/slonik/issues/182

[gajus]

This is how I fixed it https://github.com/gajus/slonik/commit/042669dab03421e18e8dda270c92a4089cbdedd7, but not sure if that was the expected way.

[charmander]

@gajus That works, yes. You can also write parseArray(arrayValue, typeParser.parse).