Switch to re2-wasm (#467)

re2 uses a native module that has a normal dependency on node-gyp, which
bloats the installed size of a service and requires special care when
packaging.

re2-wasm has no dependencies, and while it is not officially supported, it is
used by grpc-node's grpc-js-xds package.

Author: adamthom-amzn

smithy-typescript-ssdk-libs/server-common/package.json

@@ -23,7 +23,7 @@
     "@aws-sdk/smithy-client": "3.38.0",
     "@aws-sdk/types": "3.38.0",
     "tslib": "^1.8.0",
-    "re2": "^1.16.0"
+    "re2-wasm": "^1.0.2"
   },
   "devDependencies": {
     "@types/jest": "^26.0.22",

smithy-typescript-ssdk-libs/server-common/src/validation/validators.ts

@@ -13,7 +13,7 @@
  *  permissions and limitations under the License.
  */
 
-import RE2 from "re2";
+import { RE2 } from "re2-wasm";
 
 import {
   EnumValidationFailure,
@@ -271,7 +271,7 @@ export class PatternValidator implements SingleConstraintValidator<string, Patte
       return null;
     }
 
-    if (!input.match(this.pattern)) {
+    if (!this.pattern.match(input)) {
       return {
         constraintType: "pattern",
         constraintValues: this.inputPattern,