Fix: Two import-level DeprecationWarnings in 3.8

bottle.py

@@ -35,7 +35,7 @@
     if _cmd_options.server and _cmd_options.server.startswith('gevent'):
         import gevent.monkey; gevent.monkey.patch_all()
 
-import base64, cgi, email.utils, functools, hmac, imp, itertools, mimetypes,\
+import base64, cgi, email.utils, functools, hmac, itertools, mimetypes,\
         os, re, subprocess, sys, tempfile, threading, time, warnings
 
 from datetime import date as datedate, datetime, timedelta
@@ -84,7 +84,12 @@ def _e(): return sys.exc_info()[1]
     from urllib.parse import urlencode, quote as urlquote, unquote as urlunquote
     urlunquote = functools.partial(urlunquote, encoding='latin1')
     from http.cookies import SimpleCookie
-    from collections import MutableMapping as DictMixin
+    if py >= (3, 3, 0):
+        from collections.abc import MutableMapping as DictMixin
+        from types import ModuleType as new_module
+    else:
+        from collections import MutableMapping as DictMixin
+        from imp import new_module
     import pickle
     from io import BytesIO
     from configparser import ConfigParser
@@ -102,6 +107,7 @@ def _raise(*a): raise a[0](a[1]).with_traceback(a[2])
     from Cookie import SimpleCookie
     from itertools import imap
     import cPickle as pickle
+    from imp import new_module
     from StringIO import StringIO as BytesIO
     from ConfigParser import SafeConfigParser as ConfigParser
     if py25:
@@ -1781,7 +1787,7 @@ def __init__(self, name, impmask):
         ''' Create a virtual package that redirects imports (see PEP 302). '''
         self.name = name
         self.impmask = impmask
-        self.module = sys.modules.setdefault(name, imp.new_module(name))
+        self.module = sys.modules.setdefault(name, new_module(name))
         self.module.__dict__.update({'__file__': __file__, '__path__': [],
                                     '__all__': [], '__loader__': self})
         sys.meta_path.append(self)