Fix peggy dependencies version

[kamiazya]

The version of peggy is fixed by peerDependencies and dependencies.

What was a problem

Currently, when I try to use the latest version of peggy@1.2.0, the following worning is displayed.

warning "> ts-pegjs@1.0.0" has incorrect peer dependency "peggy@1.1.0".

How this PR fixes the problem

Fixed peggy's 1.1.0 <=, <2.0.0 range to be supported using^.

Additional Comments

I had an idea to set peerDependencies to ^1.0.0 and dependencies to^1.2.0, but I left the version specification as it is.

[pjmolina]

Hi @kamiazya found a breaking change for ts-peg into peggy 1.2.0 that forced me to copy code into ts-peg 1.1.0.

• Functions stringEscape() and regexpClassEscape() used to be public, now are private. I will report it in peggy.
• It could be nice for peggy to keep exposing the public functionality as it is not to break pluggins.
• That's why I preffer dependences and peerDependences not to use the caret.

See my fix here: 933f2fe

[kamiazya]

Hi @pjmolina ,

Thank you for the report and fixes.

I'm sorry I didn't notice the breaking change.

[pjmolina]

No problem. Issue reported at peggy 169