Migrate plugins & demos for N4.2

[nsplugins]

[lini]

P1:

• Publish https://github.com/NativeScript/template-enterprise-auth
  https://github.com/NativeScript/template-enterprise-auth/pull/21

• Publish https://github.com/NativeScript/template-enterprise-auth-ng
  https://github.com/NativeScript/template-enterprise-auth-ng/pull/38

• Publish https://github.com/NativeScript/template-enterprise-auth-ts
  https://github.com/NativeScript/template-enterprise-auth-ts/pull/24

• Publish https://github.com/NativeScript/template-patient-care-ng
  https://github.com/NativeScript/template-patient-care-ng/commit/722ab577b98741aa18d174739199fb183046ce86

• Publish https://github.com/NativeScript/template-health-survey-ng
  https://github.com/NativeScript/template-health-survey-ng/commit/c110ba59cf8ee9f7f93e0c5d012422c0f7f241cd

• Update https://github.com/NativeScript/template-find-a-doctor-ng
  chor: update template for NativeScript 4.2 release telerik/template-find-a-doctor-ng#39

P2:

• update plugin demo apps
  OK https://github.com/NativeScript/nativescript-ui-sidedrawer/pull/39
  OK https://github.com/NativeScript/nativescript-ui-calendar/pull/28
  OK https://github.com/NativeScript/nativescript-ui-gauge/pull/17
  OK https://github.com/NativeScript/nativescript-ui-autocomplete/pull/41
  OK https://github.com/NativeScript/nativescript-ui-dataform/pull/28
  OK https://github.com/NativeScript/nativescript-ui-chart/pull/23
  OK https://github.com/NativeScript/nativescript-ui-listview/pull/56
  OK https://github.com/NativeScript/nativescript-ui-core/pull/4
• update plugin dependencies
  chor: update dependencies in src/ and demo/ package.json for 4.2.0 nativescript-plugin-seed#89
  chor: update demo apps for NativeScript 4.2.0 nativescript-facebook#114
  chor: update demo apps for NativeScript 4.2.0 nativescript-imagepicker#205
  chor: update demo apps for NativeScript 4.2.0 nativescript-geolocation#151
  chor: update demo apps for NativeScript 4.2.0 nativescript-camera#121
  chor: update demo apps for NativeScript 4.2.0 nativescript-background-http#168
  chor: update demo apps for NativeScript 4.2.0 nativescript-fresco#88