add in some settings that while they are the default values Terser use out of the box, it will help to document what settings we are using to any developer reading the code

packages/minifier-js/minifier.js

@@ -12,6 +12,9 @@ meteorJsMinify = function (source) {
         drop_debugger: false,  // remove debugger; statements
         unused: false,         // drop unreferenced functions and variables
         dead_code: true,       // remove unreachable code
+        keep_infinity: false,
+        unsafe: false,
+        unsafe_proto: false,   
         global_defs: {
           "process.env.NODE_ENV": NODE_ENV
         }