Fix cloning static query on every query call

[alexpovel]

I think this call would only need to happen a single time, yet it takes up 17% of time:

Source: via sudo CARGO_PROFILE_RELEASE_DEBUG=true cargo flamegraph --open -F5000 -- --go comments '(\\d+)(\\d)' inside of benches/kubernetes.

Source of problem might be clone here:

srgn/src/scoping/langs/go.rs

Line 92 in 9a0685c

self.query.clone().into()

There is no need to clone, as the query remains identical through the lifetime of the application. I was just lazy with respect to lifetimes.

[alexpovel]

Results look good now:

$ hyperfine --warmup 1 './srgn --gitignored --fail-empty-glob --go comments --files '\''kubernetes/**/*.go'\'' '\''[tT]he (\w+)'\''' './srgn-new --gitignored --fail-empty-glob --go comments --files '\''kubernetes/**/*.go'\'' '\''[tT]he (\w+)'\'''
Benchmark 1: ./srgn --gitignored --fail-empty-glob --go comments --files 'kubernetes/**/*.go' '[tT]he (\w+)'
  Time (mean ± σ):      2.307 s ±  0.078 s    [User: 23.973 s, System: 1.714 s]
  Range (min … max):    2.213 s …  2.439 s    10 runs

Benchmark 2: ./srgn-new --gitignored --fail-empty-glob --go comments --files 'kubernetes/**/*.go' '[tT]he (\w+)'
  Time (mean ± σ):      2.015 s ±  0.112 s    [User: 20.166 s, System: 1.577 s]
  Range (min … max):    1.889 s …  2.216 s    10 runs

Summary
  ./srgn-new --gitignored --fail-empty-glob --go comments --files 'kubernetes/**/*.go' '[tT]he (\w+)' ran
    1.14 ± 0.07 times faster than ./srgn --gitignored --fail-empty-glob --go comments --files 'kubernetes/**/*.go' '[tT]he (\w+)'

where srgn-new contains the changes from #99 . It's faster by the expected margin. See also

(slow section is no longer even visible)