Update leveldown to the latest version 🚀

The dependency leveldown was updated from `4.0.2` to `5.0.0`.

This version is not covered by your current version range.

If you don’t accept this pull request, your project will work just like it did before. However, you might be missing out on a bunch of new features, fixes and/or performance improvements from the dependency update.

Release Notes for v5.0.0

If you are upgrading: please see UPGRADING.md.

Changed

Rewrite as N-API addon (#540, #559) (@ralphtheninja)
Use prebuildify instead of prebuild (#549, #562, #571) (@ralphtheninja)
Update minimum node version required (#552) (@ralphtheninja)
Upgrade Snappy from 1.1.4 to 1.1.7 as a git submodule (#522, #535) (@filoozom)
Upgrade abstract-leveldown from ~5.0.0 to ~6.0.0 (@ralphtheninja, @vweevers) (#511)
Implement abstract _serializeKey() and _serializeValue() (#506) (@vweevers)
Implement abstract _seek() instead of seek() (#506) (@vweevers)
Invoke abstract tests from single function (#495) (@ralphtheninja)
Use suite.common() in test/common.js (7b0f6d9) (@ralphtheninja)
Handle location in LevelDOWN constructor, as location was removed from abstract-leveldown (#494) (@ralphtheninja)
Pass a factory function to abstract tests (#494) (@ralphtheninja)
Use tempy in tests, removing need for cleanup (#494) (@ralphtheninja)
Use level-concat-iterator in tests (#494) (@ralphtheninja)
Make callback of makeTest an error-first callback (#518) (@vweevers)
Upgrade standard devDependency from ^11.0.1 to ^12.0.0 (#503) (@ralphtheninja)
Upgrade slump devDependency from ~2.0.0 to ~3.0.0 (#504) (@vweevers)
Normalize gyp files (indentation and double quotes) (#539) (@ralphtheninja)
Tweak benchmarks (#545, #546) (@vweevers, @ralphtheninja)
Tweak changelog (#483) (@ralphtheninja)
Tweak copyright years for less maintenance (98cbb4f) (@ralphtheninja)
Document new platform support and prebuilt binaries (#558, #563) (@vweevers)
Replace remark-cli with hallmark (#548) (@vweevers)
Update .npmignore (@vweevers)
Apply common project tweaks (#580, #582, 1c90e8f) (@vweevers, @ralphtheninja)
Introduce override and final keywords following C++ Core Guidelines (#600) (@vweevers)

Added

Add linux-armv7, linux-arm64, android-armv7 and android-arm64 prebuilds (#584, #585, #587) (@ralphtheninja, @vweevers)
Add segfault tests (#514) (@vweevers)
Add nyc and coveralls for code coverage (#497, #591) (@ralphtheninja, @vweevers)
Copy type checks of approximateSize() to compactRange() (#517) (@vweevers)
Document that value may not be null or undefined (#511) (@vweevers)
Document batch() (array and chained form), sync option and db references (#556) (@vweevers)
Add publish instructions and download-prebuilds npm script (#564) (@vweevers)

Removed

Remove node 6 and 9 from Travis (0f5f554, #562) (@ralphtheninja)
Remove 32 bits from AppVeyor (#560) (@ralphtheninja)
Remove unused .jshintrc (1d122b0) (@ralphtheninja)
Remove copyright headers from code (508027d) (@ralphtheninja)
Remove contributors from package.json (8a29ecc) (@ralphtheninja)
Remove g++-4.8 apt package from Travis (#489) (@ralphtheninja)
Remove unused key argument from ChainedBatch#_clear (#519) (@vweevers)
Remove redundant db.close() from test/approximate-size-test.js (d04f233) (@ralphtheninja)
Moved seek tests to abstract-leveldown (#508) (@vweevers)
Remove unused iota-array and lexicographic-integer devDependencies (#508) (@vweevers)
Remove xcacheSize and xmaxOpenFiles from leak tests (#569) (@ralphtheninja)
Remove legacy bindings dependency (#583) (@peakji)

Fixed

Serialize compactRange() arguments (#517) (@vweevers)
Prevent segfault: when calling iterator() on non-open db (#514) (@vweevers)
Prevent segfault: add PriorityWorker to defer closing until put is done (#597) (@vweevers)
Prevent segfault: keep persistent references to iterators until they are ended (#597) (@vweevers)
Gitignore Debug builds of LevelDB and Snappy (#597) (@vweevers)
Fix subtests by adding t.plan() (#594) (@vweevers)

Commits

The new version differs by 127 commits ahead by 127, behind by 7.

0bfa4cb 5.0.0
104dea2 Prepare v5.0.0 (#604)
1fbfe37 Introduce 'override' and 'final' keywords following C++ Core Guidelines (#600)
d84b084 Merge pull request #597 from Level/fix-segfaults-on-close-and-gc
195c78c Add PriorityWorker to defer closing until put is done
ff5eaae Fix leaking leveldb::ReadOptions
dbd0039 Keep persistent references to iterators until they are ended
3d567fb Gitignore Debug builds of LevelDB and Snappy
3ff48f1 fix subtests by adding t.plan() (#594)
6d1804a chore(package): update nyc to version 13.2.0 (#591)
f1d4c7c Add linux-arm64, android-arm and android-arm64 prebuilds (#587)
77b1e30 Create explicit CI job matrix (#585)
1d3dae0 5.0.0-2
90b3c54 Cross compile armv7 (for RPI) (#584)
1c90e8f Fix anchor links for destroy() and repair()

There are 127 commits in total.

See the full diff

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