Changelog

Fixed

• Corrected the deprecation warning message for
  qiskit.converters.qobj_to_circuits (#2350)
• Fixed execute() and transpile() functions to enable setting
  optimization level 0. (#2370)
• Set the swapper with the seed transpiler for optimization level 2 and 3
  (#2361)
• Fix default basis gate set for other transpiler passes (#2357)
• Fix the docstring for transpile to include optimization_level 3 (#2367)
• Fix spacing in the text circuit drawer (#2382)
• Fix for too strict math sanitization pulse instructions (#2397)
• Arugments to assemble_schedule were not actually optional, ensure
  they're required (#2398)
• Fix for framchange instructions being converted to a string instead of a
  float (#2437)
• Fix for rep_times as a float, now it's an integer (#2438)
• Fix type error for integer framechange instructions (#2458)
• Fix for missing cython source files in sdist (#2436)
• Fix for different pulse schedules created with the same name (#2431)
• Only create a single AquireInstruction for all qubits (#2485)
• Stop modifying layout in stochastic swap pass (#2507)
• Only call CXDirection pass on optimization_level=3 if coupling map is
  provided (#2526)
• Fix optimization_level=0 without a coupling map (#2509)