Fix outside the bounds error and vertical line at last value for lineplot

[damianpowell]

Fixes issue #18.

OperationStopped: /Path/To/Modules/Graphical/1.0.2/src/Get-LinePlot.ps1:33:21
Line |
  33 |                      $Array[$j,$i] = $Line # add line
     |                      ~~~~~~~~~~~~~~~~~~~~~
     | Index was outside the bounds of the array.

Also Fixes a suprious vertical line that is produced on the final value. Old behaviour:

 106┤                                                 ▐ 
 105┤                ██                               ▐ 
 104┤          █    ▐ ▐                               ▐ 
 103┤         ▐▐ █  ▐ ▐                               ▐ 
 102┤         ▐ █▐  ▐  █                              ▐ 
 101┤       █ █  ▐  ▐  ▐                              ▐ 
 100┤      ▐▐▐   ▐  ▐  ▐        █   ██                ▐ 
  99┤      ▐▐▐   ▐  ▐  ▐       █▐  ▐ ▐                ▐ 
  98┤      ▐ █   ▐  █  ▐      ▐ ▐  ▐ ▐                ▐ 
  97┤      ▐      ██   ▐      ▐ ▐  ▐ ▐                ▐ 
  96┤      ▐            █ ██  ▐  █ █ ▐  █             ▐ 
  95┤      ▐            ▐█ ▐  ▐  ▐▐  ▐ ▐▐█            ▐ 
  94┤ █    █               ▐  ▐   █  ▐ ▐ ▐            ▐ 
  93┤█▐   ▐                ▐  ▐       ██  █           ▐ 
  92┤  █  ▐                ▐  ▐           ▐           ▐ 
  91┤  ▐  ▐                 █ ▐           ▐           ▐ 
  90┤  ▐  ▐                 ▐ █           ▐           ▐ 
  89┤  ▐  █                 ▐▐             █    █     ▐ 
  88┤  ▐ ▐                  ▐▐             ▐███▐▐     ▐ 
  87┤  ▐ █                  ▐▐                ▐▐ █    ▐ 
  86┤   █                    █                ▐▐ ▐    ▐ 
  85┤                                          █  █   ▐ 
  84┤                                             ▐█ █▐ 
  83┤                                              ▐▐▐█ 
  82┤                                               █ ▐ 
    └─────────┬─────────┬─────────┬─────────┬─────────┬ 
             10        20        30        40        50 

New behaviour:

 106┤                                                   
 105┤                ██                                 
 104┤          █    ▐ ▐                                 
 103┤         ▐▐ █  ▐ ▐                                 
 102┤         ▐ █▐  ▐  █                                
 101┤       █ █  ▐  ▐  ▐                                
 100┤      ▐▐▐   ▐  ▐  ▐        █   ██                  
  99┤      ▐▐▐   ▐  ▐  ▐       █▐  ▐ ▐                  
  98┤      ▐ █   ▐  █  ▐      ▐ ▐  ▐ ▐                  
  97┤      ▐      ██   ▐      ▐ ▐  ▐ ▐                  
  96┤      ▐            █ ██  ▐  █ █ ▐  █               
  95┤      ▐            ▐█ ▐  ▐  ▐▐  ▐ ▐▐█              
  94┤ █    █               ▐  ▐   █  ▐ ▐ ▐              
  93┤█▐   ▐                ▐  ▐       ██  █             
  92┤  █  ▐                ▐  ▐           ▐             
  91┤  ▐  ▐                 █ ▐           ▐             
  90┤  ▐  ▐                 ▐ █           ▐             
  89┤  ▐  █                 ▐▐             █    █       
  88┤  ▐ ▐                  ▐▐             ▐███▐▐       
  87┤  ▐ █                  ▐▐                ▐▐ █      
  86┤   █                    █                ▐▐ ▐      
  85┤                                          █  █     
  84┤                                             ▐█ █  
  83┤                                              ▐▐▐█ 
  82┤                                               █   
    └─────────┬─────────┬─────────┬─────────┬─────────┬ 
             10        20        30        40        50