npm生成的package.json文件中依賴項版本號前的波浪號(~)和插入符號(^)是啥意思？

package.json通常也就長這麼模樣：node { "name": "", "description": "", "version": "4.17.1", "author": "", "contributors": [], "license": "MIT", "repository": "", "homepage": "", "keywords": [],

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