Change logger import to ES6

src/autodiscovery.js

@@ -17,7 +17,7 @@ limitations under the License.
 /** @module auto-discovery */
 
 import Promise from 'bluebird';
-const logger = require("./logger");
+import logger from './logger';
 import { URL as NodeURL } from "url";
 
 // Dev note: Auto discovery is part of the spec.

src/crypto/algorithms/megolm.js

@@ -25,7 +25,6 @@ limitations under the License.
 import Promise from 'bluebird';
 import logger from '../../../src/logger';
 
-const logger = require("../../logger");
 const utils = require("../../utils");
 const olmlib = require("../olmlib");
 const base = require("./base");

src/crypto/algorithms/olm.js

@@ -22,7 +22,7 @@ limitations under the License.
  */
 import Promise from 'bluebird';
 
-const logger = require("../../logger");
+import logger from '../../logger';
 const utils = require("../../utils");
 const olmlib = require("../olmlib");
 const DeviceInfo = require("../deviceinfo");

src/crypto/index.js

@@ -25,7 +25,7 @@ const anotherjson = require('another-json');
 import Promise from 'bluebird';
 import {EventEmitter} from 'events';
 
-const logger = require("../logger");
+import logger from '../logger';
 const utils = require("../utils");
 const OlmDevice = require("./OlmDevice");
 const olmlib = require("./olmlib");

src/crypto/olmlib.js

@@ -24,7 +24,7 @@ limitations under the License.
 import Promise from 'bluebird';
 const anotherjson = require('another-json');
 
-const logger = require("../logger");
+import logger from '../logger';
 const utils = require("../utils");
 
 /**