Fix threehumpcamel test

Author: stefan-k

crates/argmin-testfunctions/proptest-regressions/threehumpcamel.txt

@@ -10,3 +10,4 @@ cc 19d4b7948cc1fd0ea46016d4f357b24aa6d1a37d8afdbfe980f2e93c7d648b7e # shrinks to
 cc e58163502f9d04f24664ffb602f05bb5daad2f84d94f07e2522b49446b17249f # shrinks to a = 4.954327515861796, b = -2.4636603000647304
 cc d3ae78f96834a1bf181153d45c51e444cf398b326c10e7eb429ededc47801e4c # shrinks to a = 1.4578585137075646, b = 0.0
 cc fe1b1bc0615cb469d0e3fbc77d571548ac20f458ec2009d30a6f80daaf966e5e
+cc a33db84b70e432f5c3f443a40111d6f059d962b0bfe3079ef9238ead37d79cb5

crates/argmin-testfunctions/src/threehumpcamel.rs

@@ -134,7 +134,7 @@ mod tests {
                             hessian[i][j],
                             hessian_fd[i][j],
                             epsilon = f64::EPSILON,
-                            max_relative = 1e-5
+                            max_relative = 1e-4
                         );
                     }
                 }