cmd2: Constrain version to >= 1.3.0 but < 2.0.0

2.0.0 introduces several incompatible changes, see
https://github.com/python-cmd2/cmd2/blob/master/CHANGELOG.md
as well as https://github.com/python-cmd2/cmd2/issues/1120

As we want to be able to use what distributions ship, let's stay
with 1.x for now.  If piip is used, use 1.5

Change-Id: Iecc953269d5ae9ed9f31b829743c63bdfd29fa61

README.md

@@ -37,7 +37,7 @@ Please install the following dependencies:
  - pyscard
  - serial
  - pytlv
- - cmd2
+ - cmd2 >= 1.3.0 but < 2.0.0
  - jsonpath-ng
  - construct
  - bidict

contrib/jenkins.sh

@@ -19,7 +19,7 @@ virtualenv -p python3 venv --system-site-packages
 . venv/bin/activate
 pip install pytlv
 pip install pyyaml
-pip install cmd2
+pip install cmd2==1.5
 pip install jsonpath-ng
 pip install construct
 pip install bidict

requirements.txt

@@ -1,7 +1,7 @@
 pyscard
 serial
 pytlv
-cmd2
+cmd2==1.5
 jsonpath-ng
 construct
 bidict

setup.py

@@ -12,7 +12,7 @@ setup(
         "pyscard",
         "serial",
         "pytlv",
-        "cmd2 >= 1.3.0",
+        "cmd2 >= 1.3.0, < 2.0.0",
         "jsonpath-ng",
         "construct >= 2.9",
         "bidict",