feat(mojaloop/#2092): upgrade nodeJS version for core services (#154)

feat(mojaloop/#2092): upgrade nodeJS version for core services - mojaloop/project#2092
- standardised CI scripts
- fixed lint issues
- updated .nvmrc to latest LTS version
- added standard CI scripts/config to package.json: release, snapshot, standard-version, etc
- updated gitignore to include test/results and IGNORE patterns
- added useUnknownInCatchVariables config to tsconfig to support current code style
- updated README with standard auto-release information

Notes: 
- npm-audit-resolver v3.0.0-7 is a candidate release to resolve compatibility with npm v7+ as described in naugtur/npm-audit-resolver#34. This will need to be addressed going forward as `npm run audit:resolve` (i.e. `resolve-audit`) is currently not functioning. As a work-around, we need to manually run the following command `npm audit fix`. The `npm run audit:check` (i.e. `check-audit`) still works as expected.

BREAKING CHANGE: major version bump for node v16 LTS support, and re-structuring of project directories to align to core Mojaloop repositories!