Merge branch 'upstream-exprtk' into update-exprtk-0.0.3

# By ExprTk Upstream
* upstream-exprtk:
  exprtk 2025-03-11 (ae952e70)

ThirdParty/exprtk/vtkexprtk/CMakeLists.txt

 set(headers
- exprtk.hpp)
+ include/exprtk.hpp)
 
 vtk_module_install_headers(
   SUBDIR  "vtkexprtk"

ThirdParty/exprtk/vtkexprtk/License.txt

-/*
- ******************************************************************
- *           C++ Mathematical Expression Toolkit Library          *
- *                                                                *
- * Author: Arash Partow (1999-2021)                               *
- * URL: http://www.partow.net/programming/exprtk/index.html       *
- *                                                                *
- * Copyright notice:                                              *
- * Free use of the C++ Mathematical Expression Toolkit Library is *
- * permitted under the guidelines and in accordance with the most *
- * current version of the MIT License.                            *
- * http://www.opensource.org/licenses/MIT                         *
- *                                                                *
- * Example expressions:                                           *
- * (00) (y + x / y) * (x - y / x)                                 *
- * (01) (x^2 / sin(2 * pi / y)) - x / 2                           *
- * (02) sqrt(1 - (x^2))                                           *
- * (03) 1 - sin(2 * x) + cos(pi / y)                              *
- * (04) a * exp(2 * t) + c                                        *
- * (05) if(((x + 2) == 3) and ((y + 5) <= 9),1 + w, 2 / z)        *
- * (06) (avg(x,y) <= x + y ? x - y : x * y) + 2 * pi / x          *
- * (07) z := x + sin(2 * pi / y)                                  *
- * (08) u := 2 * (pi * z) / (w := x + cos(y / pi))                *
- * (09) clamp(-1,sin(2 * pi * x) + cos(y / 2 * pi),+1)            *
- * (10) inrange(-2,m,+2) == if(({-2 <= m} and [m <= +2]),1,0)     *
- * (11) (2sin(x)cos(2y)7 + 1) == (2 * sin(x) * cos(2*y) * 7 + 1)  *
- * (12) (x ilike 's*ri?g') and [y < (3 z^7 + w)]                  *
- *                                                                *
- ******************************************************************
-*/
+MIT License
+
+Copyright (c) 1999-2024 Arash Partow
+
+https://www.partow.net/programming/exprtk/index.html
+
+Permission is hereby granted, free of charge, to any person  obtaining
+a  copy  of  this software  and  associated  documentation files  (the
+"Software"), to  deal in  the Software  without restriction, including
+without limitation the  rights to use,  copy, modify, merge,  publish,
+distribute, sublicense,  and/or sell  copies of  the Software,  and to
+permit persons to whom the Software is furnished to do so, subject  to
+the following conditions:
+
+The  above  copyright  notice  and  this  permission  notice  shall be
+included in all copies or substantial portions of the Software.
+
+THE  SOFTWARE  IS PROVIDED  "AS  IS", WITHOUT  WARRANTY  OF ANY  KIND,
+EXPRESS OR  IMPLIED, INCLUDING  BUT NOT  LIMITED TO  THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS  OR COPYRIGHT HOLDERS BE LIABLE FOR  ANY
+CLAIM, DAMAGES OR OTHER LIABILITY,  WHETHER IN AN ACTION OF  CONTRACT,
+TORT OR  OTHERWISE, ARISING  FROM, OUT  OF OR  IN CONNECTION  WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.