feat: API improvements

Author: maximkrouk

Sources/FunctionalClosures/DataSource.swift

@@ -6,8 +6,8 @@ public class DataSource<Input, Output> {
     public struct Container {
         internal var action: ((Input) -> Output)
 
-        public init(handler: @escaping (Input) -> Output) {
-            self.action = handler
+        public init(action: @escaping (Input) -> Output) {
+            self.action = action
         }
 
         public mutating func callAsFunction(perform action: @escaping (Input) -> Output) {
@@ -42,8 +42,8 @@ public class OptionalDataSource<Input, Output> {
 
         internal init() {}
 
-        public init(handler: ((Input) -> Output)?) {
-            self.action = handler
+        public init(action: ((Input) -> Output)?) {
+            self.action = action
         }
 
         public mutating func callAsFunction(perform action: ((Input) -> Output)?) {

Sources/FunctionalClosures/Handler.swift

@@ -9,8 +9,8 @@ public class Handler<Input> {
 
         internal init() {}
 
-        public init(handler: ((Input) -> Void)?) {
-            self.action = handler
+        public init(action: ((Input) -> Void)?) {
+            self.action = action
         }
 
         public mutating func callAsFunction(action: ((Input) -> Void)?) {
@@ -79,8 +79,8 @@ public class Handler2<T0, T1> {
 
         internal init() {}
 
-        public init(handler: ((T0, T1) -> Void)?) {
-            self.action = handler
+        public init(action: ((T0, T1) -> Void)?) {
+            self.action = action
         }
 
         public mutating func callAsFunction(action: ((T0, T1) -> Void)?) {
@@ -147,8 +147,8 @@ public class Handler3<T0, T1, T2> {
 
         internal init() {}
 
-        public init(handler: ((T0, T1, T2) -> Void)?) {
-            self.action = handler
+        public init(action: ((T0, T1, T2) -> Void)?) {
+            self.action = action
         }
 
         public mutating func callAsFunction(action: ((T0, T1, T2) -> Void)?) {
@@ -215,8 +215,8 @@ public class Handler4<T0, T1, T2, T3> {
 
         internal init() {}
 
-        public init(handler: ((T0, T1, T2, T3) -> Void)?) {
-            self.action = handler
+        public init(action: ((T0, T1, T2, T3) -> Void)?) {
+            self.action = action
         }
 
         public mutating func callAsFunction(action: ((T0, T1, T2, T3) -> Void)?) {
@@ -283,8 +283,8 @@ public class Handler5<T0, T1, T2, T3, T4> {
 
         internal init() {}
 
-        public init(handler: ((T0, T1, T2, T3, T4) -> Void)?) {
-            self.action = handler
+        public init(action: ((T0, T1, T2, T3, T4) -> Void)?) {
+            self.action = action
         }
 
         public mutating func callAsFunction(action: ((T0, T1, T2, T3, T4) -> Void)?) {