use `esModuleInterop` for for support `import os from "os"`

bin/doctor.ts

@@ -18,7 +18,7 @@
  *
  */
 
-import * as os from 'os'
+import os from 'os'
 
 import { config }   from '../src/config'
 import { Doctor }   from '../src/doctor'

src/accessory.spec.ts

@@ -18,7 +18,7 @@
  *
  */
 // tslint:disable:no-shadowed-variable
-import * as test  from 'blue-tape'
+import test  from 'blue-tape'
 // import * as sinon from 'sinon'
 
 import {

src/config.spec.ts

@@ -18,7 +18,7 @@
  *
  */
 // tslint:disable:no-shadowed-variable
-import * as test  from 'blue-tape'
+import test  from 'blue-tape'
 // import * as sinon from 'sinon'
 // const sinonTest   = require('sinon-test')(sinon)
 

tsconfig.json

@@ -9,6 +9,7 @@
     , "declaration"     : true
     , "sourceMap"       : true
     , "skipLibCheck"    : true
+    , "esModuleInterop" : true
 
     , "emitDecoratorMetadata"  : true
     , "experimentalDecorators" : true