[Snyk] Security upgrade @angular/cli from 1.7.3 to 6.0.0

[gz-c]

This PR was automatically created by Snyk using the credentials of a real user.

Snyk has created this PR to fix one or more vulnerable packages in the `npm` dependencies of this project.

#### Changes included in this PR - Changes to the following files to upgrade the vulnerable dependencies to a fixed version: - package.json - package-lock.json #### Vulnerabilities that will be fixed ##### With an upgrade: Severity | Priority Score (*) | Issue | Breaking Change | Exploit Maturity :-------------------------:|-------------------------|:-------------------------|:-------------------------|:-------------------------  | **551/1000**
**Why?** Recently disclosed, Has a fix available, CVSS 5.3 | Regular Expression Denial of Service (ReDoS)
[SNYK-JS-LOADERUTILS-3042992](https://snyk.io/vuln/SNYK-JS-LOADERUTILS-3042992) | Yes | No Known Exploit (*) Note that the real score may have changed since the PR was raised. Check the changes in this PR to ensure they won't cause issues with your project. ------------ **Note:** *You are seeing this because you or someone else with access to this repository has authorized Snyk to open fix PRs.* For more information: 🧐 [View latest project report](https://app.snyk.io/org/gz-c/project/c78e772f-ccee-4791-86a2-735166d34b87?utm_source=github&utm_medium=referral&page=fix-pr) 🛠 [Adjust project settings](https://app.snyk.io/org/gz-c/project/c78e772f-ccee-4791-86a2-735166d34b87?utm_source=github&utm_medium=referral&page=fix-pr/settings) 📚 [Read more about Snyk's upgrade and patch logic](https://support.snyk.io/hc/en-us/articles/360003891078-Snyk-patches-to-fix-vulnerabilities) [//]: # (snyk:metadata:{"prId":"f372f77a-3e7f-455a-bd00-7436b092bba9","prPublicId":"f372f77a-3e7f-455a-bd00-7436b092bba9","dependencies":[{"name":"@angular/cli","from":"1.7.3","to":"6.0.0"}],"packageManager":"npm","projectPublicId":"c78e772f-ccee-4791-86a2-735166d34b87","projectUrl":"https://app.snyk.io/org/gz-c/project/c78e772f-ccee-4791-86a2-735166d34b87?utm_source=github&utm_medium=referral&page=fix-pr","type":"auto","patch":[],"vulns":["SNYK-JS-LOADERUTILS-3042992"],"upgrade":["SNYK-JS-LOADERUTILS-3042992"],"isBreakingChange":true,"env":"prod","prType":"fix","templateVariants":["updated-fix-title","priorityScore"],"priorityScoreList":[551]}) --- **Learn how to fix vulnerabilities with free interactive lessons:** 🦉 [Regular Expression Denial of Service (ReDoS)](https://learn.snyk.io/lessons/redos/javascript/?loc=fix-pr)

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