release notes for 1.50.7; set future versions to 1.50.8-alpha

Dapper.sln

@@ -9,6 +9,7 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution
 		appveyor.yml = appveyor.yml
 		build.ps1 = build.ps1
 		Directory.build.props = Directory.build.props
+		docs\index.md = docs\index.md
 		License.txt = License.txt
 		nuget.config = nuget.config
 		Readme.md = Readme.md

docs/index.md

@@ -20,6 +20,14 @@ Note: to get the latest pre-release build, add ` -Pre` to the end of the command
 
 ## Release  Notes
 
+### 1.50.7
+
+- Fix #1190 - incorrect unmanaged pointer when processing parameters that are a boxed struct (rare error relating to GC)
+- Fix #1111 - make `SqlMapper.Parse` consistent with `QueryImpl`
+- Fix #111- - improve error message for invalid literal types
+- Fix #1149 - improve error messages in "contrib"
+- Improved detection of empty table-valued-parameters
+
 ### 1.50.5
 
 - Fixes empty result set hanging with `QueryAsync`

version.json

 {
-  "version": "1.50.7",
+  "version": "1.50.8-alpha.{height}",
   "assemblyVersion": "1.50.0.0",
   "publicReleaseRefSpec": [
     "^refs/heads/master$",