Fix detection of dependencies to deploy

[spalladino]

The hasDependenciesForDeploy method, used to check whether to ask the user if they wanted to deploy dependencies, used a different criteria to that of the NetworkController.

openzeppelin-sdk/packages/cli/src/models/network/NetworkController.ts

Lines 939 to 943 in 2640124

	public async deployDependencyIfNeeded(depName: string, depVersion: string): Promise<void | never> {
	try {
	const dependency = new Dependency(depName, depVersion);
	if (dependency.isDeployedOnNetwork(this.network) || this.networkFile.dependencyHasMatchingCustomDeploy(depName))
	return;

This PR changes the criteria in Dependency so the user is only prompted if the controller would deploy anything. Note that the controller fails to check for version mismatch, which required skipping a test, but that's a different bug to address.

[ylv-io]

Nice refactor of linkedDependencies