chore: replace json-stable-stringify with safe-stable-stringify#738

BridgeAR wants to merge 2 commits intoember-cli:masterember-cli/ember-cli-htmlbars:masterfrom

BridgeAR:switch-to-safe-stable-stringifyBridgeAR/ember-cli-htmlbars:switch-to-safe-stable-stringifyCopy head branch name to clipboard