fix: update standalone to 1.88.77 to fix Let's Encrypt CA issue

Author: mefellows

setup.py

@@ -15,7 +15,7 @@
 
 
 IS_64 = sys.maxsize > 2 ** 32
-PACT_STANDALONE_VERSION = '1.88.75'
+PACT_STANDALONE_VERSION = '1.88.77'
 PACT_STANDALONE_SUFFIXES = ['osx.tar.gz',
                             'linux-x86_64.tar.gz',
                             'linux-x86.tar.gz',