将npm升级到6.3.0后，每次在Mac上打开终端（ZSH）时，都会出现以下错误：
npm ERR! path /Users/danilo/package.json
npm ERR! code ENOENT
npm ERR! errno -2
npm ERR! syscall open
npm ERR! enoent ENOENT: no such file or directory, open '/Users/danilo/package.json'
npm ERR! enoent This is related to npm not being able to find a file.
npm ERR! enoent
npm ERR! A complete log of this run can be found in:
npm ERR! /Users/danilo/.npm/_logs/2018-08-06T10_43_16_213Z-debug.log
我尝试了npm cache verify和npm cache clean --force，但是都没有用。这是完整的错误日志：
0 info it worked if it ends with ok
1 verbose cli [ '/Users/danilo/.nvm/versions/node/v8.11.1/bin/node',
1 verbose cli '/Users/danilo/.nvm/versions/node/v8.11.1/bin/npm',
1 verbose cli 'test',
1 verbose cli '-w',
1 verbose cli '/Users/danilo' ]
2 info using npm@6.3.0
3 info using node@v8.11.1
4 verbose config Skipping project config: /Users/danilo/.npmrc. (matches userconfig)
5 verbose stack Error: ENOENT: no such file or directory, open '/Users/danilo/package.json'
6 verbose cwd /Users/danilo
7 verbose Darwin 17.7.0
8 verbose argv "/Users/danilo/.nvm/versions/node/v8.11.1/bin/node" "/Users/danilo/.nvm/versions/node/v8.11.1/bin/npm" "test" "-w" "/Users/danilo"
9 verbose node v8.11.1
10 verbose npm v6.3.0
11 error path /Users/danilo/package.json
12 error code ENOENT
13 error errno -2
14 error syscall open
15 error enoent ENOENT: no such file or directory, open '/Users/danilo/package.json'
16 error enoent This is related to npm not being able to find a file.
17 verbose exit [ -2, true ]