Release v0.5.0

Changed

• Rename executable to semgrep
• Deep expression matching in conditionals requires different syntax:

  if <... $X = True ...>:
      ...
  

  will now match

  if foo == bar and baz == True:
      return 1

• Deduplicate semgrep output in cases where there are multiple ways
  a rule matches section of code
• Deep statement matchings goes into functions and classes:

  $X = ...
  ...
  bar($X)
  

  now matches with

  QUX = "qux"
  
  function baz() {
      function foo() {
          bar(QUX)
      }
  }

Added

• python2 is a valid supported language

Fixed

• Expression will right hand side of assignment/variable definition in javascript. See #429

  foo();
  

  will now match

  var x = foo();
  

• Regression where "..." was matching empty list

  foo("...")
  

  does not match

  foo()