Typescript 3.x Support

[g-marconet]

Hi,

I noticed #4, but I am having issues getting the plugin to work with Typescript 3. The rules seem to be loaded just fine, but they never actually execute.

Steps to reproduce:

• Generate new project with typescript 3.0.3 and tslint 5.11.0. Write a file that blatantly goes against one of the rules in tslint-config-security. Make sure tslint.json extends tslint-config-security.
• Clone tslint-config-security in an adjacent directory
• npm install in tslint-config-security
• npm link in tslint-config-security
• npm link tslint-config-security in your project
• Run tslint. Notice no errors are present (or at least, none from tslint-config-security)
• Go into the local clone of tslint-config-security, change the typescript version to 3.1.2
• npm install in tslint-config-security
• Run tslint. Notice it now shows errors from tslint-config-security

This might also be an issue with tslint or with typescript. I haven't had an opportunity to dig much further into it.

[webschik]

I've updated Typescript and TSLint versions (see v1.8.0) and aligned them with tslint-config-airbnb