Dub doesn't default the compiler to the only available

[MrcSnm]

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System information

• dub version: 1.29.0
• OS Platform and distribution: Windows 10
• compiler version N/A

Bug Description

DUB doesn't infer default compiler

How to reproduce?

Put those configs on dub.json

"toolchainRequirements": {
		"dmd": "no",
		"gdc": "no"
	},

Run dub: Error ->

Installed dmd 2.100.0-dirty is not supported by test. Supported compiler(s):
  - ldc

Expected Behavior

Automatically add --compiler=ldc2 when it is the only available option

Logs