Running ng update @angular/cli @angular/core I would get this every time
Package "@angular/compiler-cli" has an incompatible peer dependency to "@angular/compiler" (requires "8.2.0-next.1", would install "8.1.1") Package "ag-grid-angular" has an incompatible peer dependency to "@angular/compiler-cli" (requires ">=2.1.x" (extended), would install "8.2.0-next.1").
Package "angular-calendar" has an incompatible peer dependency to "@angular/core" (requires ">=5.0.0 <7.0.0" (extended), would install "8.1.1").
Package "@angular/compiler-cli" has an incompatible peer dependency to "@angular/compiler" (requires "8.2.0-next.1" (extended), would install "8.1.1").
Package "angular-calendar" has an incompatible peer dependency to "@angular/common" (requires ">=5.0.0 <7.0.0" (extended), would install "8.1.1").
Package "angular-calendar" has an incompatible peer dependency to "@angular/animations" (requires ">=5.0.0 <7.0.0" (extended), would install "8.1.1").
My Environment now is :
Angular CLI: 7.3.9
Node: 12.6.0
OS: win32 x64
Angular: 7.1.4
... common, compiler, compiler-cli, core, forms, http
... language-service, platform-browser, platform-browser-dynamic
... platform-server, router
Package Version
------------------------------------------------------------
@angular-devkit/architect 0.12.4
@angular-devkit/build-angular 0.12.4
@angular-devkit/build-optimizer 0.12.4
@angular-devkit/build-webpack 0.12.4
@angular-devkit/core 7.2.4
@angular-devkit/schematics 7.3.9
@angular/animations 7.2.15
@angular/cdk 7.3.7
@angular/cli 7.3.9
@angular/material 7.2.0
@angular/material-moment-adapter 7.3.7
@ngtools/webpack 7.2.4
@schematics/angular 7.3.9
@schematics/update 0.13.9
rxjs 6.5.2
typescript 3.4.5
webpack 4.28.4
You may need to run this command:
ng update --all --force
This sort of updates all applicable Angular packages.
As for the other 3rd party packages such as angular-calendar, you may need to manually run the npm command to update them to the versions that supports Angular 8.
When it comes to checking your 3rd party packages, you can simply run the command and it will return the list of latest versions for those packages.
npm outdated