fix(no-ignored-replay-buffer): check config bufferSize

[JasonWeinzierl]

Fixes cartant#100

There's also a proposed fix PR in the upstream repo cartant#114 but I avoided looking at that solution to avoid any license issue, so this solution might be different.

• Fix: if the shareReplay operator was passed an object config, then require bufferSize to be in that object.
• Fix: the rule wasn't handling if shareReplay is imported under a namespace.
  • (Might need to review the entire project. Since rxjs now recommends importing from "rxjs" instead of "rxjs/operators", there's a risk that many rules also fail to account for that new paradigm. Note that this rule is the only rule that tests namespace imports for all cases, so we at least should expand that coverage/type of test.)

[github-actions]

LCOV of commit 514d20b during .github/workflows/ci.yml #40

Summary coverage rate:
  lines......: 96.3% (3276 of 3403 lines)
  functions..: 93.0% (198 of 213 functions)
  branches...: 91.2% (620 of 680 branches)

Files changed coverage rate:
                                         |Lines       |Functions  |Branches    
  Filename                               |Rate     Num|Rate    Num|Rate     Num
  =============================================================================
  src/rules/no-ignored-replay-buffer.ts  | 100%     75| 100%     7| 100%     13