Add devDependency @aws-sdk/client-documentation-generator (#195)

Author: trivikr

smithy-typescript-codegen/src/main/java/software/amazon/smithy/typescript/codegen/TypeScriptDependency.java

@@ -29,6 +29,7 @@
 public enum TypeScriptDependency implements SymbolDependencyContainer {
 
     TS_LIB("devDependencies", "tslib", "^1.8.0", true),
+    AWS_SDK_CLIENT_DOCGEN("devDependencies", "@aws-sdk/client-documentation-generator", "1.0.0-gamma.3", true),
     AWS_SDK_TYPES("dependencies", "@aws-sdk/types", "^1.0.0-beta.0", true),
     AWS_SMITHY_CLIENT("dependencies", "@aws-sdk/smithy-client", "^1.0.0-beta.0", true),
     INVALID_DEPENDENCY("dependencies", "@aws-sdk/invalid-dependency", "^1.0.0-beta.0", true),

smithy-typescript-codegen/src/test/java/software/amazon/smithy/typescript/codegen/TypeScriptDependencyTest.java

@@ -22,5 +22,7 @@ public void createsSymbols() {
     public void getsUnconditionalDependencies() {
         assertThat(TypeScriptDependency.getUnconditionalDependencies(),
                    hasItem(TypeScriptDependency.TS_LIB.dependency));
+        assertThat(TypeScriptDependency.getUnconditionalDependencies(),
+                   hasItem(TypeScriptDependency.AWS_SDK_CLIENT_DOCGEN.dependency));
     }
 }