node: Reduce CircleCI memory usage for Linuxbrew (#3136)
node: Reduce CircleCI memory usage for Linuxbrew (#3136)

Increase the number of build processes to speed up the build on CircleCI.
Linuxbrew/homebrew-core,LinuxbrewTestBot/homebrew-core,rwhogg/homebrew-core,maxim-belkin/homebrew-core,Linuxbrew/homebrew-core,maxim-belkin/homebrew-core,LinuxbrewTestBot/homebrew-core,rwhogg/homebrew-core