Bump @now/build-utils to 0.9.9

[AndyBitz]

Bump @now/build-utils to 0.9.9 to fix 404 error for zero-config.

[codecov-io]

Codecov Report

Merging #2713 into canary will decrease coverage by 0.07%.
The diff coverage is n/a.

@@            Coverage Diff            @@
##           canary   #2713      +/-   ##
=========================================
- Coverage    8.27%    8.2%   -0.08%     
=========================================
  Files         261     261              
  Lines       10535   10495      -40     
  Branches     1344    1342       -2     
=========================================
- Hits          872     861      -11     
+ Misses       9604    9575      -29     
  Partials       59      59

Impacted Files	Coverage Δ
src/util/dev/yarn-installer.ts	37.28% <0%> (-0.81%)	⬇️
src/util/dev/builder-cache.ts	39.26% <0%> (-0.44%)	⬇️
src/util/dev/server.ts	12.04% <0%> (-0.23%)	⬇️
src/util/dev/builder.ts	12.36% <0%> (+0.26%)	⬆️
src/util/get-files.ts	87.07% <0%> (+0.81%)	⬆️
src/util/output/create-output.ts	29.54% <0%> (+2.46%)	⬆️
src/util/dev/router.ts	80.3% <0%> (+4.58%)	⬆️
src/util/metrics.ts	68.18% <0%> (+6.64%)	⬆️
src/util/prefer-v2-deployment.ts	69.44% <0%> (+6.94%)	⬆️

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