feat: add encrypted, multi-env configs

[kincaidoneil]

• fix: update eth & xrp plugins to resolve streams hanging when connector tops up channel
• fix: xrp issues with custom rippled setup

[codecov-io]

Codecov Report

Merging #41 into master will decrease coverage by 0.34%. The diff coverage is 87.17%.

@@            Coverage Diff             @@
##           master      #41      +/-   ##
==========================================
- Coverage   90.23%   89.89%   -0.35%     
==========================================
  Files          16       16              
  Lines         635      653      +18     
  Branches       31       31              
==========================================
+ Hits          573      587      +14     
- Misses         52       56       +4     
  Partials       10       10

Impacted Files	Coverage Δ
src/services/stream-server.ts	83.33% <ø> (ø)	:arrow_up:
src/settlement/machinomy.ts	93.54% <0%> (-1.54%)	:arrow_down:
src/settlement/xrp-paychan.ts	93.33% <0%> (-1.27%)	:arrow_down:
src/settlement/lnd.ts	89.28% <0%> (-1.63%)	:arrow_down:
src/index.ts	93.65% <93.33%> (+0.2%)	:arrow_up:
src/config.ts	88.57% <95.23%> (+2.2%)	:arrow_up:

---

Continue to review full report at Codecov.

Legend - Click here to learn more Δ = absolute <relative> (impact), ø = not affected, ? = missing data Powered by Codecov. Last update 725fd97...05ca297. Read the comment docs.

[kincaidoneil]

Not sure the best way to test these:

• Configs with multiple environments
• Correct conversion of configs using the current schema (v0.3-0.4) to the new schema

[karzak]

Not sure the best way to test these:

• Configs with multiple environments

Rather than setting up a local environment, could we connect to the testnet and mainnet connectors? We could use lightning on mainnet to avoid fees, or just create uplinks without depositing.