Merge #612

612: Add runtimeconfig r=curquiza a=danFbach

# Pull Request

## Related issue
Fixes #605 

## What does this PR do?
- adds runtimeconfig.json, see [dotnet issue 2186](dotnet/core#2186 (comment))

## PR checklist
Please check if your PR fulfills the following requirements:
- [x] Does this PR fix an existing issue, or have you listed the changes applied in the PR description (and why they are needed)?
- [x] Have you read the contributing guidelines?
- [x] Have you made sure that the title is accurate and descriptive of the changes?


Co-authored-by: Dan Fehrenbach <dan@fbach.us>

src/Meilisearch/runtimeconfig.json

@@ -0,0 +1,7 @@
+{
+  "runtimeOptions": {
+    "configProperties": {
+      "System.Globalization.Invariant": true
+    }
+  }
+}