lodash cleanup (#747)

* add own range() function

* lodash cleanup

* remove redundant fill range implementations

* remove use of _.get

* sync test babel config with build

* update tests to match new range implementation

client/package.json

@@ -142,7 +142,9 @@
           ],
           "@babel/plugin-proposal-export-namespace-from",
           "@babel/plugin-transform-react-constant-elements",
-          "@babel/plugin-transform-runtime"
+          "@babel/plugin-transform-runtime",
+          "@babel/plugin-proposal-optional-chaining",
+          "@babel/plugin-proposal-nullish-coalescing-operator"
         ]
       }
     }