Use read_file macro in Crystal::Config.version

[Sija]

Followup to #6967. If accepted, needs to be merged after 0.27.1 release.

[bcardiff]

@Sija do you want to update this with the || raise "..." idiom?

[Sija]

@bcardiff first I'd like to discuss adding a raising variant and I'll do it after that if there won't be a consensus.

[bcardiff]

I thought the consensus was that a single variant that cover all the cases was enough.

[Sija]

@bcardiff I don't think it's settled since as I wrote in #6967 (comment) I believe having raising one is still more beneficial - raising outside of read_file will obscure the actual error - which might be other than missing file.

[woodruffw]

I began work on a variant of read_file that raises here: #7094.

[Sija]

Since #7094 has been merged, it seems it's ready to 🎲 (once 0.27.1 is released).

[sdogruyol]

Thank you @Sija 👍

[bcardiff]

@Sija would you mind pushing a rebase on master?

[Sija]

@bcardiff Sure, done.