feat: validate the version of nativescript-dev-webpack plugin on every command

[Fatme]

NativeScript CLI 6.0 cannot work with nativescript-dev-webpack with version lower than 1.0.0. So we need a validation to check the version of nativescript-dev-webpack plugin on every command. This PR validates the version of nativescript-dev-webpack plugin and throws the following error when the version of nativescript-dev-webpack is lower than 1.0.0 (for example, "~0.24.0"):

The NativeScript CLI requires nativescript-dev-webpack 1.0.0 or later to work properly. After updating nativescript-dev-webpack you need to ensure "webpack.config.js" file is up to date with the one in the new version of nativescript-dev-webpack. You can automatically update it using "./node_modules/.bin/update-ns-webpack --configs" command.

The error is NOT thrown in the following situations:

• When the version of nativescript-dev-webpack is not a valid semver version (for example: next, rc)
• When nativescript-dev-webpack plugin is referenced from local .tgz or directory
• When the version of nativescript-dev-webpack is for example 1.0.0-rc-2019-07-02-164330-03

Rel to: #4798

PR Checklist

• The PR title follows our guidelines: https://github.com/NativeScript/NativeScript/blob/master/CONTRIBUTING.md#commit-messages.
• There is an issue for the bug/feature this PR is for. To avoid wasting your time, it's best to open a suggestion issue first and wait for approval before working on it.
• You have signed the CLA.
• All existing tests are passing: https://github.com/NativeScript/nativescript-cli/blob/master/CONTRIBUTING.md#contribute-to-the-code-base
• Tests for the changes are included.

What is the current behavior?

What is the new behavior?

Fixes/Implements/Closes #[Issue Number].

[Fatme]

test cli-smoke

[Fatme]

test cli-smoke