Update dependencies

setup.py

@@ -12,13 +12,13 @@
 NAME = "doc2dash"
 INSTALL_REQUIRES = [
     "Sphinx==1.6.2",
-    "attrs==16.2.0",
-    "beautifulsoup4==4.5.1",
-    "click==6.6",
-    "colorama==0.3.7",
-    "lxml==3.6.4",
+    "attrs==17.2.0",
+    "beautifulsoup4==4.6.0",
+    "click==6.7",
+    "colorama==0.3.9",
+    "lxml==3.8.0",
     "six==1.10.0",
-    "zope.interface==4.3.2",
+    "zope.interface==4.4.1",
 ]
 ENTRY_POINTS = {
     "console_scripts": [

src/doc2dash/__main__.py

@@ -216,7 +216,7 @@ def setup_paths(source, destination, name, add_to_global, force):
     return source, dest, name
 
 
-@attr.s
+@attr.s(hash=True)
 class DocSet(object):
     """
     Summary of docset path and parameters.

src/doc2dash/parsers/intersphinx.py

@@ -45,7 +45,7 @@
 
 
 @implementer(IParser)
-@attr.s
+@attr.s(hash=True)
 class InterSphinxParser(object):
     """
     Parser for Sphinx-base documentation that generates an objects.inv file for

src/doc2dash/parsers/pydoctor.py

@@ -30,7 +30,7 @@
 
 
 @implementer(IParser)
-@attr.s
+@attr.s(hash=True)
 class PyDoctorParser(object):
     """
     Parser for pydoctor-based documentation: mainly Twisted.

src/doc2dash/parsers/utils.py

@@ -49,7 +49,7 @@ def find_and_patch_entry(soup, entry):
         """
 
 
-@attr.s
+@attr.s(hash=True)
 class TOCEntry(object):
     """
     A symbol entry generated by the parser and to be added to the TOC.
@@ -59,7 +59,7 @@ class TOCEntry(object):
     anchor = attr.ib(validator=attr.validators.instance_of(six.text_type))
 
 
-@attr.s
+@attr.s(hash=True)
 class ParserEntry(object):
     """
     A symbol as found by the parser that get yield for further processing.