Update gts to v1 and Fix code formatting

[mayurkale22]

GTS v1 release contains breaking changes. Picking up this update most likely will cause a breaking change in our project. Need to take care when picking up this update

Breaking Changes

• GTS switched to prettier as the code formatting tool (#​259). gts run fix should migrate your code over to the new style 💅.
• This release drops support for Node 6 which will reach end-of-life in April 2019 (#​256) 💀.
• This release defaults to ES2017 as the TypeScript code generation target. This means that the generated code needs a minimum of Node 8 to run. On the plus side this means that generated code would use native implementation of ES2017 features (e.g. async/await) rather than using poly-fills 🧬. This change is most likely a breaking change for your module. You can override this setting by customizing your tsconfig.json however.
• The tslint configuration has been updated to pick up changes in the Google style guide🧐.
• Assumes that target projects are using TypeScript 3.x+ 🎯.

[mayurkale22]

This will also fix 2 vulnerabilities (1 moderate, 1 high) in all OC packages.

┌───────────────┬──────────────────────────────────────────────────────────────┐
│ Moderate      │ Denial of Service                                            │
├───────────────┼──────────────────────────────────────────────────────────────┤
│ Package       │ js-yaml                                                      │
├───────────────┼──────────────────────────────────────────────────────────────┤
│ Dependency of │ gts                                                          │
├───────────────┼──────────────────────────────────────────────────────────────┤
│ Path          │ gts > tslint > js-yaml                                       │
├───────────────┼──────────────────────────────────────────────────────────────┤
│ More info     │ https://nodesecurity.io/advisories/788                       │
└───────────────┴──────────────────────────────────────────────────────────────┘


┌───────────────┬──────────────────────────────────────────────────────────────┐
│ High          │ Code Injection                                               │
├───────────────┼──────────────────────────────────────────────────────────────┤
│ Package       │ js-yaml                                                      │
├───────────────┼──────────────────────────────────────────────────────────────┤
│ Dependency of │ gts                                                          │
├───────────────┼──────────────────────────────────────────────────────────────┤
│ Path          │ gts > tslint > js-yaml                                       │
├───────────────┼──────────────────────────────────────────────────────────────┤
│ More info     │ https://nodesecurity.io/advisories/813                       │
└───────────────┴──────────────────────────────────────────────────────────────┘