`file.put` fails if `dest` is a directory

[oz123]

Describe the bug

Using files.put as:

files.put(
   src="/home/oz123/some.deb"
   dest='/home/oz123/'
   )

Results in the following error:

   [hostxxx] Command socket/SSH error: OSError('Failure',)

Which is pretty cryptic...

To Reproduce

Use as above.

Expected behavior

One can use files.put as with regular sftp or other unix commands mv, cp, which allow to ommit file name if the path is directory.

Meta

• Include output of pyinfra --support.

  
  oz123@server:~/nesuss-agents$ ./venv/bin/pyinfra --support
  --> Support information:
  
  If you are having issues with pyinfra or wish to make feature requests, please
  check out the GitHub issues at https://github.com/Fizzadar/pyinfra/issues .
  When adding an issue, be sure to include the following:
  
  System: Linux
    Platform: Linux-4.4.0-18362-Microsoft-x86_64-with-glibc2.29
    Release: 4.4.0-18362-Microsoft
    Machine: x86_64
  pyinfra: v1.4.14
  Executable: ./venv/bin/pyinfra
  Python: 3.8.10 (CPython, GCC 9.4.0)
  oz123@server:~/nesuss-agents$

+ How was pyinfra installed (source/pip)?
```pip3 install pyinfra```

The issue is actually not with pyinfra, rather with paramiko (I have 2.7.2) see here https://github.com/paramiko/paramiko/issues/1000.

[Fizzadar]

Thank you for fixing this @oz123; this is now live in v1.4.15.