--includeAngularDemo option does not work.

[robario]

Environment

• CLI: 6.5.0
• Cross-platform modules: 6.2.3
• Android Runtime: 6.2.0
• iOS Runtime: 6.2.0
• Plugin(s): none

Describe the bug
When tns plugin create, --includeAngularDemo option does not work.

To Reproduce

$ tns plugin create --pluginName=foo --username=bar --includeTypeScriptDemo=y --includeAngularDemo=n ./nativescript-foo

Expected behavior

$ ls ./nativescript-foo/demo-angular
ls: cannot access './nativescript-foo/demo-angular': No such file or directory

But the directory exists.

Sample project
none

Additional context
#4616

nativescript-cli/lib/commands/plugin/create-plugin.ts

Line 141 in 936cdff

let shouldIncludeDemo = !!includeDemoOption;

At this line, includeDemoOption is "y" or "n" then shouldIncludeDemo is always true.

[NickIliev]

@robario thanks for reporting that one - confirmed and marked it as a bug.

Workaround:: Based on the double exclamation point logic, you could just skip the flag (--includeAngularDemo) and the demo won't be created.