Support for Angular 12

[stephanabel]

I'm submitting a ... (check one with "x")

[ ] Regression (a behavior that used to work and stopped working in a new release)
[ ] Bug report  <!-- Please check the repository for a similar issue or PR before submitting -->
[ ] Support request => <!-- Please check the repository for a similar issue or PR before submitting -->
[ x] Feature request
[ ] Documentation issue or request

Current behavior

Building the application fails with the following errors:

Error: node_modules/@ngx-config/core/config.module.d.ts:14:21 - error TS2694: Namespace '"****/node_modules/@angular/core/core"' has no exported member 'ɵɵNgModuleDefWithMeta'.

14 static ɵmod: i0.ɵɵNgModuleDefWithMeta<ConfigModule, [typeof i1.ConfigPipe], never, [typeof i1.ConfigPipe]>;
~~~~~~~~~~~~~~~~~~~~~

Error: node_modules/@ngx-config/core/config.pipe.d.ts:8:21 - error TS2694: Namespace '"****/node_modules/@angular/core/core"' has no exported member 'ɵɵFactoryDef'.

8 static ɵfac: i0.ɵɵFactoryDef<ConfigPipe, never>;
~~~~~~~~~~~~

Error: node_modules/@ngx-config/core/config.pipe.d.ts:9:22 - error TS2694: Namespace '"****/node_modules/@angular/core/core"' has no exported member 'ɵɵPipeDefWithMeta'.

9 static ɵpipe: i0.ɵɵPipeDefWithMeta<ConfigPipe, "config">;
~~~~~~~~~~~~~~~~~

Error: node_modules/@ngx-config/core/config.pipe.d.ts:10:22 - error TS2724: '"****/node_modules/@angular/core/core"' has no exported member named 'ɵɵInjectableDef'. Did you mean 'ɵgetInjectableDef'?

10 static ɵprov: i0.ɵɵInjectableDef;
~~~~~~~~~~~~~~~

Error: node_modules/@ngx-config/core/config.service.d.ts:9:21 - error TS2694: Namespace '"****/node_modules/@angular/core/core"' has no exported member 'ɵɵFactoryDef'.

9 static ɵfac: i0.ɵɵFactoryDef<ConfigService, never>;
~~~~~~~~~~~~

Error: node_modules/@ngx-config/core/config.service.d.ts:10:22 - error TS2724: '"****/node_modules/@angular/core/core"' has no exported member named 'ɵɵInjectableDef'. Did you mean 'ɵgetInjectableDef'?

10 static ɵprov: i0.ɵɵInjectableDef;
~~~~~~~~~~~~~~~

Expected/desired behavior

It compiles withour errors!

What is the motivation / use case for changing the behavior?

To be able to use ngx-config with the most recent angular version

Environment

• Angular version: 12.0.2

For Tooling issues:

• Node version: v14.17.0
• Platform: Mac

• Others:

[fulls1z3]

see #169