delete all implementation

[alphmt]

Fixes #74
Fixes #41

[codecov]

Codecov Report

Merging #247 (25e9f65) into master (5967b84) will increase coverage by 0.06%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #247      +/-   ##
==========================================
+ Coverage   99.27%   99.33%   +0.06%     
==========================================
  Files          15       15              
  Lines         691      755      +64     
==========================================
+ Hits          686      750      +64     
  Misses          5        5              

Impacted Files	Coverage Δ
packages/etcd/src/index.js	100.00% <100.00%> (ø)
packages/keyv/src/index.js	97.64% <100.00%> (+0.34%)	⬆️
packages/mongo/src/index.js	100.00% <100.00%> (ø)
packages/mysql/src/index.js	100.00% <100.00%> (ø)
packages/postgres/src/index.js	100.00% <100.00%> (ø)
packages/redis/src/index.js	100.00% <100.00%> (ø)
packages/sqlite/src/index.js	100.00% <100.00%> (ø)
packages/test-suite/src/api.js	98.91% <100.00%> (+0.21%)	⬆️

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