Update bindgen-sbt-plugin to 0.3.0 (#193)

Co-authored-by: Indoor Vivants Steward[bot] <228215+Indoor+Vivants+Steward[bot]@users.noreply.github.com>

Author: indoorvivants-steward[bot]

project/plugins.sbt

@@ -1,5 +1,5 @@
 val BindgenVersion =
-  sys.env.getOrElse("SN_BINDGEN_VERSION", "0.2.4")
+  sys.env.getOrElse("SN_BINDGEN_VERSION", "0.3.0")
 
 val VcpkgVersion =
   sys.env.getOrElse("SBT_VCPKG_VERSION", "0.0.21")