Skip create PR when only git submodule is updated#1210

Yang-33 merged 12 commits intoline:masterline/line-bot-sdk-nodejs:masterfrom

Yang-33:skip-create-pr-when-only-submodule-is-updatedYang-33/line-bot-sdk-nodejs:skip-create-pr-when-only-submodule-is-updatedCopy head branch name to clipboard