Do not shade gson lib (fixes #115)

The gson lib is provided by MC anyway.
Additionally, by shading it, we relocate the lib via the FG reobfJar
task which doesn't properly handle annotations causing the Mixin
lib's MixinConfig to no longer parse properly.

versions/common.gradle

@@ -61,6 +61,8 @@ if (System.getenv('REPRODUCIBLE_BUILD') == '1') repositories.all convertRepoToHt
 configurations {
     shade
     compile.extendsFrom shade
+
+    shade.exclude group: 'com.google.code.gson', module: 'gson' // provided by MC
 }
 
 dependencies {
@@ -79,7 +81,7 @@ dependencies {
 
     def studioVersion = project.name
     if (studioVersion == '1.8.9') studioVersion = '1.8'
-    shade("com.github.ReplayMod.ReplayStudio:$studioVersion:e6f898d"){
+    shade("com.github.ReplayMod.ReplayStudio:$studioVersion:6cfc69b"){
         exclude group: 'com.google.guava', module: 'guava' // provided by MC
         exclude group: 'org.projectlombok', module: 'lombok' // runtime only for @SneakyThrows which isn't used
     }