Run eslint --fix

Summary:
CI is currently failing because of a lint issue, this fixes it and a bunch of other warnings that are auto-fixable.

**Test plan**
Quick manual test, cosmetic changes only.
Closes https://github.com/facebook/react-native/pull/16229

Differential Revision: D6009748

Pulled By: TheSavior

fbshipit-source-id: cabd44fed99dd90bd0b35626492719c139c89f34

RNTester/js/TextInputExample.ios.js

@@ -610,12 +610,12 @@ exports.examples = [
         <View>
           <TextInput
             style={styles.default}
-            selectionColor={"green"}
+            selectionColor={'green'}
             defaultValue="Highlight me"
           />
           <TextInput
             style={styles.default}
-            selectionColor={"rgba(86, 76, 205, 1)"}
+            selectionColor={'rgba(86, 76, 205, 1)'}
             defaultValue="Highlight me"
           />
         </View>
@@ -872,7 +872,7 @@ exports.examples = [
           <SelectionExample
             multiline
             style={styles.multiline}
-            value={"multiline text selection\ncan also be changed"}
+            value={'multiline text selection\ncan also be changed'}
           />
         </View>
       );