Nested maps are not recognized properly, variable completion does not work

[niedrist]

Prerequisites

• [x] Ensure you have latest version of plugin installed
• [x] Search for possible issue duplicates

Installation details

• [x] IDE version (Help->About->Copy to Clipboard)

  IntelliJ IDEA 2021.2.3 (Ultimate Edition)
  Build #IU-212.5457.46, built on October 12, 2021

• [x] intellij-hcl plugin version (Settings->Plugins) 0.7.15
• [x] Terraform version (terraform -v)

  
  Terraform v1.1.6
  on darwin_amd64

### Terraform Configuration Files
```tf

# Type specification

variable "test_var" {
  type = map(
    object({
      key1 = string
      key2 = string
    })
  )
}

# Variable access
var.test_var.some_key.key1

Exception

• Variable completion does not work properly, key1 and key2 is not suggested after some_key
• some_key.key1 is marked red (Unresolved reference)

Expected Behavior

Appropriate object keys should be suggested and not be marked red

Actual Behavior

See exception

Steps to Reproduce

1. Place cursor after var.test_var.
2. Hit your autocompletion keys (Ctrl+Space)