fix: inline typescript import

Author: lmiller1990

lib/process.js

@@ -2,7 +2,6 @@ const splitRE = /\r?\n/g
 
 const VueTemplateCompiler = require('vue-template-compiler')
 const generateSourceMap = require('./generate-source-map')
-const typescriptTransformer = require('./transformers/typescript')
 const coffeescriptTransformer = require('./transformers/coffee')
 const _processStyle = require('./process-style')
 const processCustomBlocks = require('./process-custom-blocks')
@@ -18,7 +17,7 @@ const generateCode = require('./generate-code')
 function resolveTransformer(lang = 'js', vueJestConfig) {
   const transformer = getCustomTransformer(vueJestConfig['transform'], lang)
   if (/^typescript$|tsx?$/.test(lang)) {
-    return transformer || typescriptTransformer
+    return transformer || require('./transformers/typescript')
   } else if (/^coffee$|coffeescript$/.test(lang)) {
     return transformer || coffeescriptTransformer
   } else {