Fix location of LICENSE.md file in Repo

[crweiner]

Just as in the other PR's below, this PR fixes links to your README.md file so the link is correct to your MIT License. 👍

Similar to:

• Fix link to LICENSE.md in README sendgrid-java#513
• fix: correct the LICENSE.md link in pom.xml java-http-client#109

Checklist

• I have made a material change to the repo (functionality, testing, spelling, grammar)
• I have read the [Contribution Guide] and my PR follows them.
• I updated my branch with the master branch.
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation about the functionality in the appropriate .md file
• I have added in line documentation to the code I modified

Short description of what this PR does:

Fixes link in README.md to the license file, which is proparly located at LICENSE.md not LICENSE.txt

[SendGridDX]

All committers have signed the CLA.

[crweiner]

I have also just pushed commits to update the location of the LICENSE.md file in the following locations:

csharp-http-client/nuspec/SendGrid.CSharp.HTTP.Client.3.3.0.nuspec

Line 8 in 3164990

<licenseUrl>https://github.com/sendgrid/csharp-http-client/blob/master/LICENSE</licenseUrl>

csharp-http-client/UnitTest/UnitTest.cs

Line 107 in 3164990

var licensePath = Path.Combine("..", "..", "..", "LICENSE.txt");

csharp-http-client/README.md

Line 5 in 67a0569

[](./LICENSE.txt)

This will hopefully fix one of the Travis errors: https://travis-ci.org/sendgrid/csharp-http-client/builds/446382440#L1724

[crweiner]

Good news, this change does now seem to get the Travis build to pass! 😄 👍

https://travis-ci.org/sendgrid/csharp-http-client/builds/446750111

The last successful Travis build of master was about a year ago here.

That's a +1 for having simple changes solve big problems. 😅

[crweiner]

I just saw that @AnnaDodson also has a fix for UnitTest.cs in PR #77 and Issue #76. 👍 Yay for synergy! 😄

Once her PR gets merged to fix Travis, then the location of the LICENSE.md file will still need to be changed in the README.md and SendGrid.CSharp.HTTP.Client.3.3.0.nuspec which should be taken care of by this PR.

csharp-http-client/nuspec/SendGrid.CSharp.HTTP.Client.3.3.0.nuspec

Line 8 in 3164990

<licenseUrl>https://github.com/sendgrid/csharp-http-client/blob/master/LICENSE</licenseUrl>

[thinkingserious]

Hello @crweiner,

Thanks again for the PR!

We appreciate your contribution and look forward to continued collaboration. Thanks!

Team SendGrid DX