Update angular monorepo to v12.0.3

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@angular/common	12.0.2 -> 12.0.3
@angular/compiler	12.0.2 -> 12.0.3
@angular/compiler-cli	12.0.2 -> 12.0.3

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Release Notes

angular/angular

v12.0.3

compiler-cli

Commit	Description
8bdcca1	fix(compiler-cli): better detect classes that are indirectly exported (#​42207)

Special Thanks:

AleksanderBodurri, Alex Rickabaugh, Andrew Kushnir, Andrew Scott, David Pfeiffer, David Shevitz, Doug Parker, Dylan Hunn, George Kalpakas, Igor Minar, Joey Perrott, JoostK, Kristiyan Kostadinov, Sam Severance, Serguei Cambour, Suguru Inatomi, Teri Glover, Wagner Maciel, Zach Arend, mgechev and 不肖・高橋

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