This PR significantly improves the performance of name mangling
utilities (e.g. ToGoName, etc).

The need for this occured while benchmarking go-swagger's CI suite:
surprisingly, the topmost allocator was swag.ToGoName.

It is the result of a dozen successive optimization passes driven
by profiling.

These functions now execute ~10x faster and need 100 times less
memory allocations. See BENCHMARK.md

Optimization techniques used to reduce allocations:
* pointer -> value (everything was pointers: now everything is values)
* interface -> struct with a Kind field
* closure -> func
* string to []byte: use unsafe conversion
* string concatenation -> use bytes.Buffer (recyclable, unlike
strings.Builder)
* static values converted over and over again: pre-bake the conversions
* var x []T  -> make([]T, 0, heuristic size)
* temporarily allocated values -> use pool to recycle previously
allocated data items

Optimization techniques used to reduce CPU:
* read unicode rune -> short-circuit for single byte runes
* map lookup -> func with switch statement
* for i, v := range -> for i := range (minor impact)

Signed-off-by: Frédéric BIDON <fredbi@yahoo.com>

Signed-off-by: Frederic BIDON <fredbi@yahoo.com>

* Added dependabot to keep go dependencies & actions updated.

Signed-off-by: Neo2308 <pradha.krishna.cse17@itbhu.ac.in>

* Updated gomod update frequency to monthly.

Signed-off-by: Neo2308 <pradha.krishna.cse17@itbhu.ac.in>

Bumps [actions/checkout](https://github.com/actions/checkout) from 3 to 4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v3...v4)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Bumps [actions/setup-go](https://github.com/actions/setup-go) from 4 to 5.
- [Release notes](https://github.com/actions/setup-go/releases)
- [Commits](actions/setup-go@v4...v5)

---
updated-dependencies:
- dependency-name: actions/setup-go
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Signed-off-by: Frédéric BIDON <fredbi@yahoo.com>

Bumps the development-dependencies group with 1 update: [codecov/codecov-action](https://github.com/codecov/codecov-action).


Updates `codecov/codecov-action` from 3 to 4
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/main/CHANGELOG.md)
- [Commits](codecov/codecov-action@v3...v4)

---
updated-dependencies:
- dependency-name: codecov/codecov-action
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: development-dependencies
...

Signed-off-by: dependabot[bot] <support@github.com>

Signed-off-by: Frédéric BIDON <fredbi@yahoo.com>

Bumps the development-dependencies group with 1 update: [codecov/codecov-action](https://github.com/codecov/codecov-action).


Updates `codecov/codecov-action` from 3 to 4
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/main/CHANGELOG.md)
- [Commits](codecov/codecov-action@v3...v4)

---
updated-dependencies:
- dependency-name: codecov/codecov-action
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: development-dependencies
...

Signed-off-by: dependabot[bot] <support@github.com>

Using paths-ignore as a short-circuit for doc-only PRs does not work:
branch protection rules cannot be passed.

Signed-off-by: Frederic BIDON <fredbi@yahoo.com>

Bumps the development-dependencies group with 1 update: [golangci/golangci-lint-action](https://github.com/golangci/golangci-lint-action).


Updates `golangci/golangci-lint-action` from 3 to 4
- [Release notes](https://github.com/golangci/golangci-lint-action/releases)
- [Commits](golangci/golangci-lint-action@v3...v4)

---
updated-dependencies:
- dependency-name: golangci/golangci-lint-action
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: development-dependencies
...

Signed-off-by: dependabot[bot] <support@github.com>

Bumps [github.com/stretchr/testify](https://github.com/stretchr/testify) from 1.8.4 to 1.9.0.
- [Release notes](https://github.com/stretchr/testify/releases)
- [Commits](stretchr/testify@v1.8.4...v1.9.0)

---
updated-dependencies:
- dependency-name: github.com/stretchr/testify
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Signed-off-by: Frederic BIDON <fredbi@yahoo.com>

dependency-type is irrelevant in the gomod ecosystem.

This setting prevented some updates to auto-merge as expected.

Signed-off-by: Frederic BIDON <fredbi@yahoo.com>

Signed-off-by: Frederic BIDON <fredbi@yahoo.com>