refactor!: finish parser migration

Finally! :)

This removes all code related to the old parser.

#65

lib/parser/classes/SectionList.js

@@ -0,0 +1,27 @@
+'use strict';
+
+const Parser = require('..');
+
+class SectionList {
+  type = 'SectionList';
+
+  constructor(data) {
+    if (data.targetId) {
+      this.target_id = data.targetId;
+    }
+    this.contents = Parser.parse(data.contents);
+
+    if (data.continuations) {
+      if (data.continuations[0].nextContinuationData) {
+        this.continuation = data.continuations[0].nextContinuationData.continuation;
+      } else if (data.continuations[0].reloadContinuationData) {
+        this.continuation = data.continuations[0].reloadContinuationData.continuation;
+      }
+    }
+    if (data.header) {
+      this.header = Parser.parse(data.header);
+    }
+  }
+}
+
+module.exports = SectionList;