Protobuf `metadata.tools` not updated in v1.5

[coderpatros]

[jkowalleck]

i will take this over

[jkowalleck]

will have this issue fixed, as soon as
#385
is done

[jkowalleck]

v1.4:

specification/schema/bom-1.4.proto

Line 282 in 8af880d

repeated Tool tools = 2;

v1.5:

specification/schema/bom-1.5.proto

Line 424 in 8af880d

optional Tool tools = 2;

Once, tools was a repeated list of Tool ...
Now is just one element at max? wtf ... this was an odd decision ...
Because now I can express one tool at max. not all of them ...
well, this was a breaking change .... again ...

But at least the Tool got a list of compoentns and services to represent other "tools"

specification/schema/bom-1.5.proto

Lines 599 to 602 in c320fc0

	// A list of software and hardware components used as tools
	repeated Component components = 6;
	// A list of services used as tools. This may include microservices, function-as-a-service, and other types of network or intra-process services.
	repeated Service services = 7;

To me this issue seams to be solved, even though the solution was just odd.

[jkowalleck]

@coderpatros could you review my conclusion, and decide whether the issue is solved?