chore: replace fully-specified FiringModifierResponse values with defaults

src/perks/exotic_perks.rs

@@ -193,9 +193,7 @@ pub fn exotic_perks() {
             };
             FiringModifierResponse {
                 burst_delay_scale: delay_mult,
-                burst_delay_add: 0.0,
-                inner_burst_scale: 1.0,
-                burst_size_add: 0.0,
+                ..Default::default()
             }
         }),
     );
@@ -241,9 +239,7 @@ pub fn exotic_perks() {
             };
             FiringModifierResponse {
                 burst_delay_scale: delay_mult,
-                burst_delay_add: 0.0,
-                inner_burst_scale: 1.0,
-                burst_size_add: 0.0,
+                ..Default::default()
             }
         }),
     );

src/perks/year_1_perks.rs

@@ -334,9 +334,7 @@ pub fn year_1_perks() {
             };
             FiringModifierResponse {
                 burst_delay_scale: delay_mult,
-                burst_delay_add: 0.0,
-                inner_burst_scale: 1.0,
-                burst_size_add: 0.0,
+                ..Default::default()
             }
         }),
     );

src/perks/year_4_perks.rs

@@ -45,9 +45,8 @@ pub fn year_4_perks() {
             };
             FiringModifierResponse {
                 burst_delay_scale: firing_slow,
-                burst_delay_add: 0.0,
                 inner_burst_scale: firing_slow,
-                burst_size_add: 0.0,
+                ..Default::default()
             }
         }),
     );
@@ -186,9 +185,7 @@ pub fn year_4_perks() {
             };
             FiringModifierResponse {
                 burst_delay_scale: delay_mult,
-                burst_delay_add: 0.0,
-                inner_burst_scale: 1.0,
-                burst_size_add: 0.0,
+                ..Default::default()
             }
         }),
     );

src/perks/year_5_perks.rs

@@ -29,9 +29,7 @@ pub fn year_5_perks() {
             }
             FiringModifierResponse {
                 burst_delay_scale: delay_mult,
-                burst_delay_add: 0.0,
-                inner_burst_scale: 1.0,
-                burst_size_add: 0.0,
+                ..Default::default()
             }
         }),
     );