chore(doc-gen): export interfaces over vars

If a symbol is declared as an interface and a var then we should export
it as an interface rather than a var.

Author: petebacondarwin

docs/typescript-package/services/tsParser/getExportDocType.js

@@ -3,12 +3,6 @@ var ts = require('typescript');
 module.exports = function getExportDocType(log) {
 
   return function(symbol) {
-    if(symbol.flags & ts.SymbolFlags.FunctionScopedVariable) {
-      return 'var';
-    }
-    if(symbol.flags & ts.SymbolFlags.BlockScopedVariable) {
-      return getBlockScopedVariableDocType(symbol);
-    }
     if(symbol.flags & ts.SymbolFlags.Function) {
       return 'function';
     }
@@ -30,6 +24,12 @@ module.exports = function getExportDocType(log) {
     if(symbol.flags & ts.SymbolFlags.TypeAlias) {
       return 'type-alias';
     }
+    if(symbol.flags & ts.SymbolFlags.FunctionScopedVariable) {
+      return 'var';
+    }
+    if(symbol.flags & ts.SymbolFlags.BlockScopedVariable) {
+      return getBlockScopedVariableDocType(symbol);
+    }
 
     log.warn('getExportDocType(): Unknown symbol type', {
       symbolName: symbol.name,