Lint fixes.

src/components/fields/DocLabel.jsx

@@ -10,6 +10,7 @@ export default class DocLabel extends React.Component {
       PropTypes.string
     ]).isRequired,
     fieldSpec: PropTypes.object.isRequired,
+    onToggleDoc: PropTypes.func.isRequired,
   }
 
   constructor (props) {

src/components/inputs/InputBlock.jsx

@@ -17,6 +17,7 @@ class InputBlock extends React.Component {
     children: PropTypes.node.isRequired,
     style: PropTypes.object,
     onChange: PropTypes.func,
+    fieldSpec: PropTypes.object,
   }
 
   constructor (props) {

src/components/inputs/SpecDoc.js

@@ -1,7 +1,13 @@
 import React from 'react'
+import PropTypes from 'prop-types'
 
-export default function SpecDoc (props={}) {
-  const {fieldSpec} = props;
+export default class SpecDoc extends React.Component {
+  static propTypes = {
+    fieldSpec: PropTypes.object.isRequired,
+  }
+
+  render () {
+    const {fieldSpec} = this.props;
 
     const {doc} = fieldSpec;
     const sdkSupport = fieldSpec['sdk-support'];
@@ -52,4 +58,5 @@ export default function SpecDoc (props={}) {
         }
       </>
     );
+  }
 }