fixing install default and eigen version (#118)

Author: MJC598

CMakePresets.json

@@ -44,6 +44,7 @@
             "cacheVariables": {
                 "CMAKE_BUILD_TYPE": "Debug",
                 "RESPOND_BUILD_TESTS": "ON",
+                "RESPOND_INSTALL": "OFF",
                 "RESPOND_CALCULATE_COVERAGE": "ON"
             }
         },
@@ -54,6 +55,7 @@
             "cacheVariables": {
                 "CMAKE_BUILD_TYPE": "Release",
                 "RESPOND_BUILD_TESTS": "OFF",
+                "RESPOND_INSTALL": "ON",
                 "RESPOND_CALCULATE_COVERAGE": "OFF"
             }
         },
@@ -74,7 +76,6 @@
                 "RESPOND_BUILD_BENCH": "OFF",
                 "RESPOND_BUILD_WARNINGS": "ON",
                 "RESPOND_SYSTEM_INCLUDES": "OFF",
-                "RESPOND_INSTALL": "OFF",
                 "RESPOND_NO_EXCEPTIONS": "OFF"
             }
         },

cmake/LoadEigen.cmake

@@ -5,7 +5,7 @@ list(APPEND CMAKE_MESSAGE_INDENT "  ")
 FetchContent_Declare(
     Eigen3
     GIT_REPOSITORY https://gitlab.com/libeigen/eigen.git
-    GIT_TAG 5.0.1
+    GIT_TAG "3.4.0"
     FIND_PACKAGE_ARGS NAMES Eigen3
 )