Sort versions in status output in natural order.

[GunnarFarneback]

Use natural sort comparison to list versions in the expected order.

Before:

$ juliaup status
 Default  Channel  Version                       Update                                           
--------------------------------------------------------------------------------------------------
          0.6      0.6.4+0.x64.linux.gnu                                                          
          1.10     1.10.0-beta1+0.x64.linux.gnu  Update to 1.10.0-beta2+0.x64.linux.gnu available 
          1.6      1.6.7+0.x64.linux.gnu                                                          
          1.6.7    1.6.7+0.x64.linux.gnu                                                          
          1.7      1.7.3+0.x64.linux.gnu                                                          
          1.8      1.8.5+0.x64.linux.gnu                                                          
          1.9      1.9.2+0.x64.linux.gnu         Update to 1.9.3+0.x64.linux.gnu available        
       *  release  1.9.2+0.x64.linux.gnu         Update to 1.9.3+0.x64.linux.gnu available        

After:

$ juliaup status
 Default  Channel  Version                       Update                                           
--------------------------------------------------------------------------------------------------
          0.6      0.6.4+0.x64.linux.gnu                                                          
          1.6      1.6.7+0.x64.linux.gnu                                                          
          1.6.7    1.6.7+0.x64.linux.gnu                                                          
          1.7      1.7.3+0.x64.linux.gnu                                                          
          1.8      1.8.5+0.x64.linux.gnu                                                          
          1.9      1.9.2+0.x64.linux.gnu         Update to 1.9.3+0.x64.linux.gnu available        
          1.10     1.10.0-beta1+0.x64.linux.gnu  Update to 1.10.0-beta2+0.x64.linux.gnu available 
       *  release  1.9.2+0.x64.linux.gnu         Update to 1.9.3+0.x64.linux.gnu available       

[LilithHafner]

See also: #685

While we're at it, we might as well also human sort the juliaup override status list

juliaup/src/command_override.rs

Line 34 in 1c1b936

.sorted_by_key(|i| i.path.to_string())

[GunnarFarneback]

I was looking at that sort as well but I have never used overrides and haven't even investigated what they are good for, so my list was empty, making it difficult to verify that a sorting change is effective or meaningful at all.

[StefanKarpinski]

I'm also not clear on whether it's a good idea to natural sort paths. Natural sorting version names is a clear winner, so lets go ahead with that and we can open an issue for natural sorting of paths.