Update mustache dependency to 0.9.6 (#46243)

modules/lang-mustache/build.gradle

@@ -23,6 +23,6 @@ esplugin {
 }
 
 dependencies {
-  compile "com.github.spullara.mustache.java:compiler:0.9.3"
+  compile "com.github.spullara.mustache.java:compiler:0.9.6"
 }
 

modules/lang-mustache/licenses/compiler-0.9.3.jar.sha1

@@ -1 +0,0 @@
-2815e016c63bec4f18704ea4f5489106a5b01a99

modules/lang-mustache/licenses/compiler-0.9.6.jar.sha1

@@ -0,0 +1 @@
+1b8707299c34406ed0ba40bbf8513352ac4765c9