message: Add CallOverrides optional param for constant fns
diff: @@ -21,7 +21,9 @@ function generateFunction(returnResultObject: boolean, fn: FunctionDeclaration,
  return `
  ${generateFunctionDocumentation(fn.documentation)}
  ${overloadedName ?? fn.name}(${generateInputTypes(fn.inputs)}${
  - !isConstant(fn) && !isConstantFn(fn) ? `overrides?: ${isPayable(fn) ? 'PayableOverrides' : 'Overrides'}` : ''
  + !isConstant(fn) && !isConstantFn(fn)
  + ? `overrides?: ${isPayable(fn) ? 'PayableOverrides' : 'Overrides'}`
  + : 'overrides?: CallOverrides'
  }): Promise<${
  fn.stateMutability === 'pure' || fn.stateMutability === 'view'
  ? generateOutputTypes(returnResultObject, fn.outputs)
  