feat(analyzer): update AnalyzedCommit to add flexibility in parsing a message

This provides flexibility of parsing and rendering structured messages
with more detail in the changelog and helps extract metadata from the 
message. The new structure can be used to split a message in multiple 
blocks (e.g. footer)

pkg/config/config.go

@@ -13,6 +13,11 @@ const (
 	DefaultTagPrefix = "v"
 )
 
+// AnalyzerConfig struct
+type AnalyzerConfig struct {
+	BlockPrefixes []string `yaml:"blockPrefixes"`
+}
+
 // ChangelogConfig struct
 type ChangelogConfig struct {
 	PrintAll      bool            `yaml:"printAll,omitempty"`
@@ -83,6 +88,7 @@ type Checksum struct {
 type ReleaseConfig struct {
 	CommitFormat   string            `yaml:"commitFormat"`
 	Branch         map[string]string `yaml:"branch"`
+	Analyzer	   AnalyzerConfig	 `yaml:"analyzer"`
 	Changelog      ChangelogConfig   `yaml:"changelog,omitempty"`
 	Release        string            `yaml:"release,omitempty"`
 	GitHubProvider GitHubProvider    `yaml:"github,omitempty"`

pkg/config/config_test.go

@@ -100,6 +100,7 @@ github:
 				Compress: false}},
 		ReleaseTitle: "go-semantic-release release",
 		IsPreRelease: false,
+		Analyzer: config.AnalyzerConfig{BlockPrefixes: []string{}},
 	}, result)
 
 }