Fix typescript-node installation due to @types/bluebird 3.5.35

[wing328]

Fix typescript-node installation due to @types/bluebird 3.5.35 (latest release) as reported by the CI:

> @openapitools/node-typescript-petstore@0.0.1 build
> tsc

node_modules/@types/bluebird/index.d.ts(42,47): error TS1005: '?' expected.
node_modules/@types/bluebird/index.d.ts(42,59): error TS1005: ';' expected.
node_modules/@types/bluebird/index.d.ts(43,34): error TS1110: Type expected.
node_modules/@types/bluebird/index.d.ts(44,27): error TS1110: Type expected.
node_modules/@types/bluebird/index.d.ts(54,17): error TS1005: ']' expected.
node_modules/@types/bluebird/index.d.ts(54,20): error TS1005: ';' expected.
node_modules/@types/bluebird/index.d.ts(54,39): error TS1005: '(' expected.
node_modules/@types/bluebird/index.d.ts(54,40): error TS1135: Argument expression expected.
node_modules/@types/bluebird/index.d.ts(54,66): error TS1005: '(' expected.
node_modules/@types/bluebird/index.d.ts(55,1): error TS1128: Declaration or statement expected.
node_modules/@types/bluebird/index.d.ts(58,17): error TS1005: ']' expected.
node_modules/@types/bluebird/index.d.ts(58,20): error TS1005: ';' expected.
node_modules/@types/bluebird/index.d.ts(58,25): error TS1005: ';' expected.
node_modules/@types/bluebird/index.d.ts(58,50): error TS1005: ';' expected.
node_modules/@types/bluebird/index.d.ts(58,51): error TS1128: Declaration or statement expected.
node_modules/@types/bluebird/index.d.ts(59,1): error TS1128: Declaration or statement expected.
[ERROR] Failed to execute goal org.codehaus.mojo:exec-maven-plugin:1.2.1:exec (npm-run-build) on project TypeScriptNodeNPMPestoreClientTests: Command execution failed. Process exited with an error: 2 (Exit value: 2) -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.codehaus.mojo:exec-maven-plugin:1.2.1:exec (npm-run-build) on project TypeScriptNodeNPMPestoreClientTests: Command execution failed.

Fix by hard-coding the version to 3.5.33 for the time being until someone can come up with a fix to make it work with 3.5.35.

cc @TiFu (2017/07) @taxpon (2017/07) @sebastianhaas (2017/07) @kenisteward (2017/07) @Vrolijkx (2017/09) @macjohnny (2018/01) @topce (2018/10) @akehir (2019/07) @petejohansonxo (2019/11) @amakhrov (2020/02)

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[wing328]

A quick merge to stop the Travis CI failure in the master. Happy to revert later if there are better solutions.