reduce Python 3 testing to speed up CI (#487) · python-control/python-control@d66f4e4

Original file line number	Diff line number	Diff line change
`@@ -12,10 +12,9 @@ cache:`
`12`	`12`	`- $HOME/.cache/pip`
`13`	`13`	`- $HOME/.local`
`14`	`14`
	`15`	`+# Test against earliest supported (Python 3) release and latest stable release`
`15`	`16`	`python:`
`16`	`17`	`- "3.9"`
`17`		`- - "3.8"`
`18`		`- - "3.7"`
`19`	`18`	`- "3.6"`
`20`	`19`
`21`	`20`	`env:`
`@@ -25,9 +24,6 @@ env:`
`25`	`24`	`# Add optional builds that test against latest version of slycot, python`
`26`	`25`	`jobs:`
`27`	`26`	`include:`
`28`		`- - name: "Python 3.8, slycot=source"`
`29`		`-python: "3.8"`
`30`		`-env: SCIPY=scipy SLYCOT=source`
`31`	`27`	`- name: "Python 3.9, slycot=source, array and matrix"`
`32`	`28`	`python: "3.9"`
`33`	`29`	`env: SCIPY=scipy SLYCOT=source PYTHON_CONTROL_ARRAY_AND_MATRIX=1`