Added the new TestSuiteInitializer and ScenarioInitializer

[lonnblad]

This PR changes the setup from this:

func FeatureContext(s *godog.Suite){
	s.BeforeSuite(func() {})
	s.AfterSuite(func() {})

	s.BeforeScenario(func(_ *messages.Pickle) {})
	s.AfterScenario(func(_ *messages.Pickle, _ error) {})

	s.BeforeStep(func(_ *messages.Pickle_PickleStep) {})
	s.AfterStep(func(_ *messages.Pickle_PickleStep, _ error) {})

	s.Step(`^(\-*\d+\.\d+) godogs$`, godogs)
}

To this:

func InitiateSuite(ctx *godog.SuiteContext){
	ctx.BeforeSuite(func() {})
	ctx.AfterSuite(func() {})
}

func InitiateScenario(ctx *godog.ScenarioContext) {
	ctx.BeforeScenario(func(_ *godog.Scenario) {})
	ctx.AfterScenario(func(_ *godog.Scenario, _ error) {})

	ctx.BeforeStep(func(_ *godog.Step) {})
	ctx.AfterStep(func(_ *godog.Step, _ error) {})
    
	ctx.Step(`^(\-*\d+\.\d+) godogs$`, godogs)
}

The solution is backwards compatible and the old solution has been marked as deprecated.

[codecov]

Codecov Report

Merging #294 into master will decrease coverage by 0.84%.
The diff coverage is 57.57%.

@@            Coverage Diff             @@
##           master     #294      +/-   ##
==========================================
- Coverage   84.92%   84.07%   -0.85%     
==========================================
  Files          16       17       +1     
  Lines        2500     2549      +49     
==========================================
+ Hits         2123     2143      +20     
- Misses        259      285      +26     
- Partials      118      121       +3     

Impacted Files	Coverage Δ
test_context.go	14.28% <14.28%> (ø)
run.go	70.42% <42.10%> (-9.26%)	⬇️
ast.go	83.33% <66.66%> (ø)
builder.go	65.42% <82.92%> (+2.23%)	⬆️
suite.go	88.05% <100.00%> (+0.09%)	⬆️

---

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[JannaLoeffler]

👍

[mxygem]

Niiiiiice!