pyenv install --list的dyld: Library not loaded: /usr/local/opt/readline/lib/libreadline.7.dylib错误修复

pyenv install --list如果报错:

Available versions:
dyld: Library not loaded: /usr/local/opt/readline/lib/libreadline.7.dylib
  Referenced from: /usr/local/bin/awk
  Reason: image not found
/usr/local/bin/python-build: line 2000: 51283 Done                    sed 'h; s/[+-]/./g; s/.p\([[:digit:]]\)/.z.\1/; s/$/.z/; G; s/\n/ /'
     51285 Broken pipe: 13         | LC_ALL=C sort -t. -k 1,1 -k 2,2n -k 3,3n -k 4,4n -k 5,5n
     51286 Abort trap: 6           | awk '{print $2}'

原因：找不到libreadline.7.dylib

解决办法：把现在的版本，比如 libreadline.8.0.dylib连接到libreadline.7.dylib即可

 ```shell
 brew reinstall readline
 ls /usr/local/opt/readline/lib/
 #如果发现libreadline.8.0.dylib，那么：
 ln -s libreadline.8.0.dylib libreadline.7.dylib
 ``