fix(install): Better platform detection (#1827)

Have refactored the platform detection in the install script to try to
better detect Windows when running the Windows install script.

install/install.sh

@@ -170,19 +170,14 @@ detect_platform() {
   local platform
   platform="$(uname -s | tr '[:upper:]' '[:lower:]')"
 
+  case "${platform}" in
+    msys_nt*) platform="pc-windows-msvc" ;;
     # mingw is Git-Bash
-  if echo "${platform}" | grep -i mingw >/dev/null; then
-    platform=pc-windows-msvc
-  fi
-
-  if [ "${platform}" = "linux" ]; then
+    mingw*) platform="pc-windows-msvc" ;;
     # use the statically compiled musl bins on linux to avoid linking issues.
-    platform=unknown-linux-musl
-  fi
-
-  if [ "${platform}" = "darwin" ]; then
-    platform=apple-darwin
-  fi
+    linux) platform="unknown-linux-musl" ;;
+    darwin) platform="apple-darwin" ;;
+  esac
 
   echo "${platform}"
 }