Firebird high-level native client for Node.js / TypeScript updated to v2.0

Firebird high-level native client for Node.js / TypeScript updated to v2.0 with a few changes :

native-driver

• Feature #34 - Support for Firebird events.
• Feature #42 - SQL role name in connection options.

native-api

• Minimal node version is 10.6.0.
• Fix #41 - Error: pointer argument must be an instance of Pointer class or null with node v13.

all projects

• Upgrade TypeScript to v3.7.