Update New-MDTable.ps1

[aaronparker]

Fix missing colon in Left separator.

Existing code does not add the left aligned colon to left align text, e.g. in the command below, the left aligned column is missing the colon character

Get-Command New-MDTable | New-MDTable -Columns ([ordered]@{Name="left";CommandType="center";Version="right"})
| Name        | CommandType | Version |
| ----------- |:-----------:| -------:|
| New-MDTable | Function    | 1.9     |

[AppVeyorBot]

❌ Build MarkdownPS 1.0.16 failed (commit 0d4499493c by @aaronparker)

[Sarafian]

Hi @aaronparker
The fix is very simple and makes sense. Not sure if you ran the unit tests, but the tests should break with the one New-MDTable with ordered columns because for some reason the : is also forgotten there.

Unfortunately I've not worked with powershellk for a while and the project's unit testing is outdated. There is another pull request #25 which I guess should solve the issues but it has not been merged.

If I can ask for the favour, would it possible to check #25 and inrcorporate those changes so the repository/module could pass all tests and get published?

[Sarafian]

@aaronparker I merged the #25 so if you can pull the changes from the master, and make sure that the Invoke-Test.ps1 works, then it should pass the test.

Before it is merged, the minor version needs to bumped to 1.20 and a line added in the changelog file. Not sure how I could contribute to be honest. I've not worked for ages on Github.

[Sarafian]

Accepting the code fix and continue with GH-42 to incorporate the rest of the changes. Thank you @aaronparker