adds minimal cli for qr code and pushing

- cli generated using typer package,
  which is added to the setup.py
- if optional argument to bump is not
  passed, the current secret is visualized
- if there is an argument, it is pushed
  as a message to the current sender
- adds setup.py command line script which
  adds a call to the bump.cli:main function
  passing the cli parameters along
- updates package version to 0.1.3

- Squashed commits:
  - commit e120815378
  - commit 3a47ee56bf
  - commit aeca052cbc
  - commit 2294650daa

bump/cli.py

@@ -0,0 +1,23 @@
+import bump
+import typer
+
+cli = typer.Typer()
+
+@cli.command()
+def default(message = typer.Argument(None, help="The message to be bumped")):
+    bp = bump.Bump()
+    if message is None:
+        bp.show_secret()
+    else:
+        bp.push(message)
+
+@cli.command()
+def push():
+    bp = bump.Bump()
+    bp.version()
+
+def main():
+    typer.run(default)
+
+if __name__ == "__main__":
+    main()