test: update address-codec tests to typescript (#2447)

- Switch files to typescript
- Add missing types in test files
- Change how the codec functions were imported. They now count towards the "% Funcs" calculation, increasing it from 75% to 100%.
- Lint test files

packages/ripple-address-codec/jest.config.js

@@ -3,5 +3,6 @@ const base = require('../../jest.config.base.js')
 
 module.exports = {
   ...base,
+  roots: [...base.roots, '<rootDir>/test'],
   displayName: 'ripple-address-codec',
 }