Bump build_runner from 2.12.2 to 2.13.0 in the dev-dependencies group

[dependabot]

Bumps the dev-dependencies group with 1 update: build_runner.

Updates build_runner from 2.12.2 to 2.13.0

Release notes

Sourced from build_runner's releases.

Performance improvements

• Performance: speedup of between 1.4x for small initial builds to 4x for large incremental builds. See dart-lang/build#4405 for full benchmark results. Optimizations included: faster management of files for analysis, re-use syntax errors computation, avoid a throw/catch on "not yet generated" source, copy asset graph without a serialization round trip, re-use trigger configuration digest.
• Add --dart-aot-perf flag for profiling on Linux. Use it with --force-aot. It runs the builders under the perf profiling tool which writes to perf.data.
• Add --verbose-durations flag that logs durations with greater precision.
• Improve debugging instructions in README.md.
• Bug fix: fix line wrapping in build_runner args usage output.

Commits

• fa791ed Release 2.13.0. (#4405)
• deee829 Lock resolvers for build. (#4403)
• 7fd0737 Add --web flag to benchmark creator. (#4404)
• ee50a88 Cache trigger digest. (#4399)
• a8f5f7c Copy AssetGraph without serializing/deserializing. (#4398)
• 5f025bd Provide a custom FileContentCache to the analyzer. (#4397)
• a215907 Reuse already-computed errors. (#4396)
• eee31aa Increase daemon test timeout. (#4395)
• aab7a70 Use asset graph in AnalysisDriverModel (#4392)
• bc94050 Emit better errors for builds with bad conditional imports (#4393)
• Additional commits viewable in compare view

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