Remove uitable dependency (#480)

The compact format now uses a table with headings and borders
as that actually looks better than what it used to, but the
pretty format looks just as before.

An unexpected optimization, I must say, but:

```
regal-table lint e2e/testdata/violations/most_violations.rego ran
  1.09 ± 0.02 times faster than regal-main lint e2e/testdata/violations/most_violations.rego
```

That'll only benefit projects with many violations though ;)

Fixes #479

Signed-off-by: Anders Eknert <anders@styra.com>

go.mod

@@ -7,7 +7,6 @@ require (
 	github.com/fatih/color v1.16.0
 	github.com/gobwas/glob v0.2.3
 	github.com/google/go-cmp v0.6.0
-	github.com/gosuri/uitable v0.0.4
 	github.com/olekukonko/tablewriter v0.0.5
 	github.com/open-policy-agent/opa v0.58.1-0.20231115111619-bcf82eb40572
 	github.com/pkg/profile v1.7.0
@@ -17,31 +16,15 @@ require (
 )
 
 require (
-	github.com/AdaLogics/go-fuzz-headers v0.0.0-20230811130428-ced1acdcaa24 // indirect
-	github.com/Microsoft/hcsshim v0.11.1 // indirect
 	github.com/OneOfOne/xxhash v1.2.8 // indirect
 	github.com/agnivade/levenshtein v1.1.1 // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
-	github.com/bytecodealliance/wasmtime-go/v3 v3.0.2 // indirect
-	github.com/cenkalti/backoff/v4 v4.2.1 // indirect
-	github.com/cespare/xxhash v1.1.0 // indirect
 	github.com/cespare/xxhash/v2 v2.2.0 // indirect
-	github.com/containerd/containerd v1.7.8 // indirect
-	github.com/containerd/log v0.1.0 // indirect
-	github.com/dgraph-io/badger/v3 v3.2103.5 // indirect
-	github.com/dgraph-io/ristretto v0.1.1 // indirect
 	github.com/dustin/go-humanize v1.0.1 // indirect
 	github.com/felixge/fgprof v0.9.3 // indirect
-	github.com/felixge/httpsnoop v1.0.4 // indirect
-	github.com/fsnotify/fsnotify v1.7.0 // indirect
 	github.com/go-ini/ini v1.67.0 // indirect
 	github.com/go-logr/logr v1.3.0 // indirect
 	github.com/go-logr/stdr v1.2.2 // indirect
-	github.com/gogo/protobuf v1.3.2 // indirect
-	github.com/golang/glog v1.1.2 // indirect
-	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
-	github.com/golang/protobuf v1.5.3 // indirect
-	github.com/golang/snappy v0.0.4 // indirect
 	github.com/google/flatbuffers v23.5.26+incompatible // indirect
 	github.com/google/pprof v0.0.0-20211214055906-6f57359322fd // indirect
 	github.com/google/uuid v1.4.0 // indirect
@@ -53,11 +36,6 @@ require (
 	github.com/mattn/go-isatty v0.0.20 // indirect
 	github.com/mattn/go-runewidth v0.0.15 // indirect
 	github.com/matttproud/golang_protobuf_extensions/v2 v2.0.0 // indirect
-	github.com/moby/locker v1.0.1 // indirect
-	github.com/opencontainers/go-digest v1.0.0 // indirect
-	github.com/opencontainers/image-spec v1.1.0-rc5 // indirect
-	github.com/peterh/liner v1.2.2 // indirect
-	github.com/pkg/errors v0.9.1 // indirect
 	github.com/prometheus/client_golang v1.17.0 // indirect
 	github.com/prometheus/client_model v0.5.0 // indirect
 	github.com/prometheus/common v0.45.0 // indirect
@@ -69,27 +47,15 @@ require (
 	github.com/xeipuuv/gojsonpointer v0.0.0-20190905194746-02993c407bfb // indirect
 	github.com/xeipuuv/gojsonreference v0.0.0-20180127040603-bd5ef7bd5415 // indirect
 	github.com/yashtewari/glob-intersection v0.2.0 // indirect
-	go.opencensus.io v0.24.0 // indirect
-	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.46.0 // indirect
 	go.opentelemetry.io/otel v1.20.0 // indirect
-	go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.20.0 // indirect
-	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.20.0 // indirect
 	go.opentelemetry.io/otel/metric v1.20.0 // indirect
 	go.opentelemetry.io/otel/sdk v1.20.0 // indirect
 	go.opentelemetry.io/otel/trace v1.20.0 // indirect
-	go.opentelemetry.io/proto/otlp v1.0.0 // indirect
-	go.uber.org/automaxprocs v1.5.3 // indirect
-	golang.org/x/net v0.18.0 // indirect
-	golang.org/x/sync v0.4.0 // indirect
 	golang.org/x/sys v0.14.0 // indirect
-	golang.org/x/text v0.14.0 // indirect
-	golang.org/x/time v0.4.0 // indirect
 	google.golang.org/genproto/googleapis/api v0.0.0-20231016165738-49dd2c1f3d0b // indirect
 	google.golang.org/genproto/googleapis/rpc v0.0.0-20231016165738-49dd2c1f3d0b // indirect
-	google.golang.org/grpc v1.59.0 // indirect
 	google.golang.org/protobuf v1.31.0 // indirect
 	gopkg.in/yaml.v2 v2.4.0 // indirect
-	oras.land/oras-go/v2 v2.3.1 // indirect
 	sigs.k8s.io/yaml v1.4.0 // indirect
 )