Revert "Fixed compatibility issue on new rxjs version"

[evias]

Reverts #201

Bugs with CLI after merge :

src/commands/account/generate.ts:128:22 - error TS2345: Argument of type 'Observable<NetworkType>' is not assignable to parameter of type 'ObservableInput<NetworkType>'.
  Type 'Observable<NetworkType>' is not assignable to type 'Subscribable<NetworkType>'.
    Types of property 'subscribe' are incompatible.
      Type '{ (observer?: NextObserver<NetworkType> | ErrorObserver<NetworkType> | CompletionObserver<NetworkType> | undefined): Subscription; (next?: ((value: NetworkType) => void) | undefined, error?: ((error: any) => void) | undefined, complete?: (() => void) | undefined): Subscription; }' is not assignable to type '{ (observer?: NextObserver<NetworkType> | ErrorObserver<NetworkType> | CompletionObserver<NetworkType> | undefined): Unsubscribable; (next: null | undefined, error: null | undefined, complete: () => void): Unsubscribable; (next: null | undefined, error: (error: any) => void, complete?: (() => void) | undefined): Uns...'.
        Types of parameters 'observer' and 'next' are incompatible.
          Type 'null | undefined' is not assignable to type 'NextObserver<NetworkType> | ErrorObserver<NetworkType> | CompletionObserver<NetworkType> | undefined'.
            Type 'null' is not assignable to type 'NextObserver<NetworkType> | ErrorObserver<NetworkType> | CompletionObserver<NetworkType> | undefined'.

128             forkJoin(networkHttp.getNetworkType(), blockHttp.getBlockByHeight(1))
                         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~


src/commands/account/generate.ts:129:29 - error TS7006: Parameter 'res' implicitly has an 'any' type.

129                 .subscribe((res) => {
                                ~~~

src/commands/account/generate.ts:140:21 - error TS7006: Parameter 'err' implicitly has an 'any' type.

140                 }, (err) => {
                        ~~~

src/commands/account/info.ts:69:17 - error TS2345: Argument of type 'import("/Users/greg/Sources/nem2/nem2-cli/node_modules/rxjs/internal/types").OperatorFunction<import("/Users/greg/Sources/nem2/nem2-sdk/dist/src/model/account/AccountInfo").AccountInfo, {}>' is not assignable to parameter of type 'import("/Users/greg/Sources/nem2/nem2-sdk/node_modules/rxjs/internal/types").OperatorFunction<import("/Users/greg/Sources/nem2/nem2-sdk/dist/src/model/account/AccountInfo").AccountInfo, {}>'.
  Types of parameters 'source' and 'source' are incompatible.
    Type 'import("/Users/greg/Sources/nem2/nem2-sdk/node_modules/rxjs/internal/Observable").Observable<import("/Users/greg/Sources/nem2/nem2-sdk/dist/src/model/account/AccountInfo").AccountInfo>' is not assignable to type 'import("/Users/greg/Sources/nem2/nem2-cli/node_modules/rxjs/internal/Observable").Observable<import("/Users/greg/Sources/nem2/nem2-sdk/dist/src/model/account/AccountInfo").AccountInfo>'.
      Types of property 'source' are incompatible.
        Type 'import("/Users/greg/Sources/nem2/nem2-sdk/node_modules/rxjs/internal/Observable").Observable<any>' is not assignable to type 'import("/Users/greg/Sources/nem2/nem2-cli/node_modules/rxjs/internal/Observable").Observable<any>'.

 69                 mergeMap((accountInfo: AccountInfo) => mosaicService.mosaicsAmountViewFromAddress(address)
                    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 70                     .pipe(
    ~~~~~~~~~~~~~~~~~~~~~~~~~~
... 
 74                             return {mosaics, info: accountInfo};
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 75                         }))),
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~

[coveralls]

Pull Request Test Coverage Report for Build 583

• 13 of 141 (9.22%) changed or added relevant lines in 14 files are covered.
• 2 unchanged lines in 1 file lost coverage.
• Overall coverage increased (+0.3%) to 60.768%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/infrastructure/api/networkRoutesApi.ts	0	2	0.0%
src/infrastructure/NamespaceHttp.ts	2	5	40.0%
src/infrastructure/NetworkHttp.ts	3	6	50.0%
src/infrastructure/api/chainRoutesApi.ts	0	4	0.0%
src/infrastructure/api/diagnosticRoutesApi.ts	0	4	0.0%
src/infrastructure/api/nodeRoutesApi.ts	0	4	0.0%
src/infrastructure/TransactionHttp.ts	3	8	37.5%
src/infrastructure/api/mosaicRoutesApi.ts	0	6	0.0%
src/infrastructure/api/namespaceRoutesApi.ts	0	8	0.0%
src/infrastructure/api/blockRoutesApi.ts	0	12	0.0%

Files with Coverage Reduction	New Missed Lines	%
src/infrastructure/NamespaceHttp.ts	2	18.0%

Totals
Change from base Build 581:	0.3%
Covered Lines:	6359
Relevant Lines:	9032

---

💛 - Coveralls