Make process.stdout.write blocking if on a lambda

This is not reliable anymore after AWS changes.

See 'nodejs/node#1741 (comment)'

.eslintrc.js

@@ -1,7 +1,6 @@
 module.exports = {
     extends: ['@financial-times/de-tooling', 'prettier'],
     plugins: ['prettier'],
-    globals: { awslambda: true },
     rules: {
         'prettier/prettier': 'error',
     },

lib/logger.js

@@ -1,4 +1,3 @@
-//
 const pino = require('pino');
 
 const isProduction = () => process.env.NODE_ENV === 'production';
@@ -15,21 +14,12 @@ const stringifyVersion = chunk =>
             `${keyString}"${pino.levels.labels[parseInt(levelString, 10)]}"`
     );
 
-const writeLambdaLog = chunk => {
-    return awslambda.sendConsoleLogs(stringifyVersion(chunk));
-};
-
 const writeLog = chunk => {
-    return process.stdout.write(stringifyVersion(chunk));
+    process.stdout.write(stringifyVersion(chunk));
 };
 
 const getProductionStream = () => ({
-    write:
-        isLambda() &&
-        awslambda &&
-        typeof awslambda.sendConsoleLogs === 'function'
-            ? writeLambdaLog
-            : writeLog,
+    write: writeLog,
 });
 
 const getPrettyPrintedStream = () => {
@@ -77,6 +67,15 @@ const getMetaData = () => ({
 });
 
 const getLoggerWithMetadata = () => {
+    /* eslint-disable no-underscore-dangle */
+    if (
+        isLambda() &&
+        process.stdout._handle &&
+        typeof process.stdout._handle.setBlocking === 'function'
+    ) {
+        process.stdout._handle.setBlocking(true);
+    }
+    /* eslint-enable no-underscore-dangle */
     const logger = getBaseLogger();
     const metadata = getMetaData();