Bind all dependencies to latest version

[Havunen]

NPM v6 has started to report security issues. There is one security issue fixed in latest version of RC. This pull request binds all packages to latest versions where security issue is fixed.

                       === npm audit security report ===                        
                                                                                
┌──────────────────────────────────────────────────────────────────────────────┐
│                                Manual Review                                 │
│            Some vulnerabilities require your attention to resolve            │
│                                                                              │
│         Visit https://go.npm.me/audit-guide for additional guidance          │
└──────────────────────────────────────────────────────────────────────────────┘
┌───────────────┬──────────────────────────────────────────────────────────────┐
│ Low           │ Prototype Pollution                                          │
├───────────────┼──────────────────────────────────────────────────────────────┤
│ Package       │ deep-extend                                                  │
├───────────────┼──────────────────────────────────────────────────────────────┤
│ Patched in    │ >=0.5.1                                                      │
├───────────────┼──────────────────────────────────────────────────────────────┤
│ Dependency of │ madge [dev]                                                  │
├───────────────┼──────────────────────────────────────────────────────────────┤
│ Path          │ madge > rc > deep-extend                                     │
├───────────────┼──────────────────────────────────────────────────────────────┤
│ More info     │ https://nodesecurity.io/advisories/612                       │
└───────────────┴──────────────────────────────────────────────────────────────┘

[!] 1 vulnerability found - Packages audited: 30308 (30308 dev, 686 optional)
    Severity: 1 Low

All tests seem to pass with updated packages and I also added .idea project files to gitignore

[pahen]

Thanks! :)