fix: changed lt(exclusiveMaximum) to le(maximum) for DEM algorithms

[JinIgarashi]

@vincentsarago I am sorry, I did a mistake for maximum value setting for DEM algorithms. It should be le (maximum) instead of lt (exclusiveMaximum).

I fixed them, and the new response of /algorithms endpoint is shown below

/algorithms endpoint response

{
   "hillshade":{
      "title":"Hillshade",
      "description":"Create hillshade from DEM dataset.",
      "inputs":{
         "nbands":1
      },
      "outputs":{
         "nbands":1,
         "dtype":"uint8",
         "min":null,
         "max":null
      },
      "parameters":{
         "azimuth":{
            "default":90,
            "maximum":360,
            "minimum":0,
            "title":"Azimuth",
            "type":"integer"
         },
         "angle_altitude":{
            "default":90,
            "maximum":90,
            "minimum":-90,
            "title":"Angle Altitude",
            "type":"number"
         },
         "buffer":{
            "default":3,
            "maximum":99,
            "minimum":0,
            "title":"Buffer",
            "type":"integer"
         }
      }
   },
   "contours":{
      "title":"Contours",
      "description":"Create contours from DEM dataset.",
      "inputs":{
         "nbands":1
      },
      "outputs":{
         "nbands":3,
         "dtype":"uint8",
         "min":null,
         "max":null
      },
      "parameters":{
         "increment":{
            "default":35,
            "maximum":999,
            "minimum":0,
            "title":"Increment",
            "type":"integer"
         },
         "thickness":{
            "default":1,
            "maximum":10,
            "minimum":0,
            "title":"Thickness",
            "type":"integer"
         },
         "minz":{
            "default":-12000,
            "maximum":99999,
            "minimum":-99999,
            "title":"Minz",
            "type":"integer"
         },
         "maxz":{
            "default":8000,
            "maximum":99999,
            "minimum":-99999,
            "title":"Maxz",
            "type":"integer"
         }
      }
   },
   "normalizedIndex":{
      "title":"Normalized Difference Index",
      "description":"Compute normalized difference index from two bands.",
      "inputs":{
         "nbands":2
      },
      "outputs":{
         "nbands":1,
         "dtype":"float32",
         "min":[
            -1
         ],
         "max":[
            1
         ]
      },
      "parameters":{
         
      }
   },
   "terrarium":{
      "title":"Terrarium",
      "description":"Encode DEM into RGB (Mapzen Terrarium).",
      "inputs":{
         "nbands":1
      },
      "outputs":{
         "nbands":3,
         "dtype":"uint8",
         "min":null,
         "max":null
      },
      "parameters":{
         
      }
   },
   "terrainrgb":{
      "title":"Terrarium",
      "description":"Encode DEM into RGB (Mapbox Terrain RGB).",
      "inputs":{
         "nbands":1
      },
      "outputs":{
         "nbands":3,
         "dtype":"uint8",
         "min":null,
         "max":null
      },
      "parameters":{
         "interval":{
            "default":0.1,
            "maximum":1,
            "minimum":0,
            "title":"Interval",
            "type":"number"
         },
         "baseval":{
            "default":-10000,
            "maximum":99999,
            "minimum":-99999,
            "title":"Baseval",
            "type":"number"
         }
      }
   }
}