lestarch: fixing on major revisions, per recommendation

.github/workflows/fprime-tools-ci.yml

@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.6, 3.7, 3.8, 3.9]
+        python-version: [3.7, 3.8, 3.9, 3.10]
 
     steps:
       - uses: actions/checkout@v2

.github/workflows/integration-tests.yml

@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.6, 3.7, 3.8, 3.9]
+        python-version: [3.7, 3.8, 3.9, 3.10]
         fprime-version: [[NASA-v1.5.3, 99cef07], [v2.0.0, 521516c], [v3.0.0, 521516c], [devel, 521516c]]
 
     steps:

setup.py

@@ -71,23 +71,23 @@
         "Operating System :: POSIX",
         "Programming Language :: Python",
         "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
+        "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: Implementation :: CPython",
         "Programming Language :: Python :: Implementation :: PyPy",
     ],
-    # Requires Python 3.6+
-    python_requires=">=3.6",
+    # Requires Python 3.7+
+    python_requires=">=3.7",
     install_requires=[
-        "lxml",
-        "Markdown",
-        "pexpect",
-        "pytest",
-        "Cheetah3",
-        "cookiecutter",
-        "gcovr",
+        "lxml>=4.6.3, <5.0.0",
+        "Markdown>=3.3.4, <4.0.0",
+        "pexpect>=4.8.0, <5.0.0",
+        "pytest>=6.2.4, <7.0.0",
+        "Cheetah3>=3.2.6, <4.0.0",
+        "cookiecutter>=1.7.2, <2.0.0",
+        "gcovr>=5.0, <6.0",
     ],
     extras_require={
         "dev": [