add option for cache capacity

[shunjizhan]

Change

latest pjs adds a config to control it's cache size, so let's give it one more chance.

hopefully fix #1050

In general I still think we should avoid building low level stuff ourselves (if possible), since it's very hard to make sure it works precisely. By adding 2 simple tests, we can already found the storage query we have been using for a long time actually returns wrong result, just happened to not affect our use case (as far as we know).

Test

all tests still pass

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78.06%. Comparing base (ce8fd1d) to head (febbf1b).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1054      +/-   ##
==========================================
+ Coverage   74.51%   78.06%   +3.55%     
==========================================
  Files          55       55              
  Lines        3178     2722     -456     
  Branches      808      617     -191     
==========================================
- Hits         2368     2125     -243     
+ Misses        786      584     -202     
+ Partials       24       13      -11     

Files with missing lines	Coverage Δ
packages/eth-providers/src/rpc-provider.ts	100.00% <100.00%> (ø)
packages/eth-rpc-adapter/src/index.ts	82.14% <ø> (ø)
packages/eth-rpc-adapter/src/utils/utils.ts	82.35% <100.00%> (+1.10%)	⬆️
packages/eth-rpc-adapter/src/wrapped-provider.ts	94.73% <100.00%> (ø)

... and 6 files with indirect coverage changes