dnsdist: Bump the required version of meson to 1.3

[rgacogne]

Short description

Since we now use the follow_symlinks option of install_data(). We could probably make it work with older versions but a quick look at what distributions provide suggests that 1.2.1 or 1.3.0 is practically the same amount of pain.

Checklist

I have:

• read the CONTRIBUTING.md document
• compiled this code
• tested this code
• included documentation (including possible behaviour changes)
• documented the code
• added or modified regression test(s)
• added or modified unit test(s)

[miodvallat]

Approved, but don't think I am endorsing 1.3 mesonry!

[coveralls]

Pull Request Test Coverage Report for Build 13306073218

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 41 unchanged lines in 11 files lost coverage.
• Overall coverage remained the same at 64.717%

---

Files with Coverage Reduction	New Missed Lines	%
pdns/dnsdistdist/dnsdist-backend.cc	1	66.19%
pdns/pollmplexer.cc	1	83.66%
pdns/recursordist/aggressive_nsec.cc	2	66.32%
pdns/recursordist/test-syncres_cc2.cc	3	88.91%
pdns/communicator.cc	3	71.85%
pdns/iputils.hh	3	78.18%
pdns/iputils.cc	3	56.99%
pdns/communicator.hh	3	77.04%
modules/gpgsqlbackend/spgsql.cc	3	68.18%
pdns/recursordist/rec-tcp.cc	5	65.28%

Totals
Change from base Build 13305454892:	0.0%
Covered Lines:	128183
Relevant Lines:	167042

---

💛 - Coveralls