migrate to ajv v7 [WIP]

[epoberezkin]

@gajus please have a look.

The changes are:

• switch to ajv v7 - now it compiles both schemas to one file with 2 exports - it reduced the size of compiled code (there is a big shared part) and simplified the code on the call site a bit.
• refactored schemas to extract shared part. It didn't affect compiled code size - I thought it would - as ajv was already re-using code from duplicated schemas, but I kept it anyway, the schemas are smaller this way - easier to change if needed.
• js-beautify is no longer included in ajv-pack (there is no ajv-pack too, standalone code generation is included in ajv now), so it is imported directly to format code. It is not necessary, strictly speaking, maybe the compiled code could be just one big string - let me know.

Should it be a major version upgrade? There is no API changes here, but eslint etc. would have 2 different ajv versions in the tree if it's not - not sure if it may cause any conflicts? It is probably worth releasing as minor version and roll-back if there are any unresolvable conflicts.

In any case please hold it until Ajv v7 is released as main version.

[coveralls]

Pull Request Test Coverage Report for Build 224

• 2 of 3 (66.67%) changed or added relevant lines in 1 file are covered.
• 38 unchanged lines in 5 files lost coverage.
• Overall coverage decreased (-16.7%) to 56.231%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/validateConfig.js	2	3	66.67%

Files with Coverage Reduction	New Missed Lines	%
src/validateConfig.js	1	20.0%
src/getBorderCharacters.js	2	0%
src/createStream.js	6	10.2%
src/makeStreamConfig.js	14	10.34%
src/makeConfig.js	15	13.79%

Totals
Change from base Build 220:	-16.7%
Covered Lines:	135
Relevant Lines:	236

---

💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 225

• 2 of 3 (66.67%) changed or added relevant lines in 1 file are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage remained the same at 72.948%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/validateConfig.js	2	3	66.67%

Files with Coverage Reduction	New Missed Lines	%
src/validateConfig.js	1	30.0%

Totals
Change from base Build 220:	0.0%
Covered Lines:	172
Relevant Lines:	236

---

💛 - Coveralls

[epoberezkin]

Actually the coverage is back where it was, it's probably because the tests failed

[epoberezkin]

I did check - eslint seems to be ok with updated table, so probably it should be a minor version.

[gajus]

🎉 This PR is included in version 6.0.5 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot 📦🚀

[epoberezkin]

I've just updated this PR to pull the main version :)

I think server works correctly, but it probably best to update the version anyway so nobody is confused - will submit the new PR.

[epoberezkin]

Ah - you've updated already - thank you :)