update angular cli 8 to 9 code example
Example 1: how to update angular version
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ng update @angular/cli @angular/core
Example 2: update angular to specific version
ng update @angular/cli@8.1.1 @angular/core@8.1.1
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ng update @angular/cli @angular/core
ng update @angular/cli@8.1.1 @angular/core@8.1.1