Use `require` instead of `import` #207

I just started to use flow-runtime & babel-plugin-flow-runtime, because these are very powerful packages.

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This is a:

• Bug Report
• Feature Request
• Question
• Other

Which concerns:

• flow-runtime
• babel-plugin-flow-runtime
• flow-runtime-validators
• flow-runtime-mobx
• flow-config-parser
• The documentation website

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What is the current behaviour?

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Currently babel-plugin-flow-runtime generates code like this:

import t from 'flow-runtime';
const User = t.type('User', t.object(
  t.property('id', t.number()),
  t.property('name', t.string())
));

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What is the expected behaviour?

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My proposal is generating code like this:

const t = require('flow-runtime');
const User = t.type('User', t.object(
  t.property('id', t.number()),
  t.property('name', t.string())
));

If I can use flow-runtime & babel-plugin-flow-runtime without adding another plugin to transpile import, it becomes non-intrusive.

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Which package versions are you using?

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