fix: use hasOwnProperty instead of []

`keywordsBlockAndTransactionProperties[cur].some` is not a function error. If current token (`cur`) is a method from Object like `toString`, `keywordsBlockAndTransactionProperties[cur]` is keywordsBlockAndTransactionProperties['toString'] and would be a function, then `fn.some` would throw the error.

Author: Yukaii

mode/solidity/solidity.js

@@ -339,17 +339,17 @@ CodeMirror.defineMode('solidity', function(config) {
 
  if (
  keywordsMoreBlockAndTransactionProperties.propertyIsEnumerable(cur) ||
- (keywordsBlockAndTransactionProperties[cur] &&
- keywordsBlockAndTransactionProperties[cur].some(function(item) {
+ (keywordsBlockAndTransactionProperties.hasOwnProperty(cur) &&
+ keywordsBlockAndTransactionProperties[cur].some(function (item) {
  return stream.match('.' + item)
  }))
  ) {
  return 'variable-2'
  }
 
  if (
- keywordsAbiEncodeDecodeFunctions[cur] &&
- keywordsAbiEncodeDecodeFunctions[cur].some(function(item) {
+ keywordsAbiEncodeDecodeFunctions.hasOwnProperty(cur) &&
+ keywordsAbiEncodeDecodeFunctions[cur].some(function (item) {
  return stream.match('.' + item)
  })
  ) {