Polythiophenes have been in general prepared either from  2,5-unsubstituted thiophenes or from 2,5-dihalogenated  thiophenes. For example, polythiophene can be prepared  from thiophene using metal-containing oxidants such as  FeCl$_{3}$ ,  MoCl$_{5}$ ,  and RuCl$_{3 }$ (Jpn. J. Appl. Phys.  1984, 23,  L899), or from 2,5-dibromothiophene via metal-catalyzed  polycondensation polymerization using  the  combined  reagent of Mg metal and Ni(0) catalyst (U.S. Pat. No.  4,521,589). Recently, the metal-catalyzed polycondensation  method has been modified by many research groups, such as  Reike’s and McCullough’s, for making regioregular poly(3- substituted thiophenes) from 3-substituted 2,5-dibromo› thiophenes using various combination of metal-containing  reagents: such as Li/naphthalene/ZnCliNi(II) or Pd(0) com- plex (U.S. Pat. No. 5,756,653), organomagnesium reagent/  Ni(II)-complex (U.S. Pat. No. 6,166,172), organomagne› sium reagent/ZnC1$_{2}$/Ni(II)-complex (U.S. Pat. No. 7,572,  880), and organomagnesium reagent/MnCliNi(II) complex  (US 2010/0234478Al ).  US 10,519,328 B2  2  1  COMPOSITION AND METHOD FOR  FORMING ELECTROACTIVE POLYMER  SOLUTION OR COATING COMPRISING  CONJUGATED HETEROAROMATIC  POLYMER, ELECTROACTIVE POLYMER  SOLUTION, OBJECTS COMPRISING THE  ELECTROACTIVE COATING, AND SOLID  ELECTROLYTIC CAPACITOR AND  METHOD FOR FABRICATING THE SAME  CROSS-REFERENCE TO RELATED  APPLICATION  BACKGROUND OF THE INVENTION  Among the conjugated conducting polymers, polyhet› eroaromatics and particularly polythiophenes have attracted  great attentions recently due to their easier processability  and better thermal stability. Regarding the conventional  methods, most of the polyheteroaromatics have been syn› thesized from heteroaromatics via oxidative polymerization  either electrochemically or chemically. For example, U.S.  Pat. No. 4,697,001 discloses synthesis of polypyrrole from  pyrrole via oxidative chemical polymerization using metal- containing oxidant, such as FeCl$_{3 }$ or Fe(OTs)$_{3}$ .  This application is a continuation-in-part application of  and claims the priority benefit of a prior application Ser. No.  14/306,251, filed on Jun. 17, 2014, now allowed. The prior  application Ser. No. 14/306,251 is a continuation-in-part  application of and claims the priority benefit of a prior  application Ser. No. 13/662,533, filed on Oct. 28, 2012, now  pending. The entirety of each of the above patent applica› tions is hereby incorporated by reference herein and made a  part of this specification.  Field of Invention  This invention relates to conducting polymers, their  preparation and their applications, and more particularly  relates to a method for forming a conjugated heteroaromatic  polymer, to a conjugated heteroaromatic homopolymer or  copolymer formed by the method, to a composition for  forming an electroactive polymer solution or coating com› prising a conjugated heteroaromatic polymer, to an electro› active polymer solution prepared from the composition, to  an electroactive coating prepared from the composition, to a  capacitor, an electroactive object, an electronic device, a  flexible electronic article, a display, an electrochromic win› dow, a touch panel, a touch screen, a corrosion-preventing  coating or a conductive ink printing comprising the electro› active coating prepared from the composition, to a method  for forming an electroactive polymer solution or coating  using the composition, to a capacitor, an electroactive  object, an electronic device, a flexible electronic article, a  display, an electrochromic window, a touch panel, a touch  screen, a corrosion-preventing coating or a conductive ink  printing comprising the electroactive coating prepared from  the coating forming method, to a method for fabricating a  solid electrolytic capacitor using the coating forming  method, and to a solid electrolytic capacitor that is fabricated  using the fabrication method.  Description of Related Art  During the past few decades, backbone-conjugated con› ducting polymers, such as polyacetylenes, polyanilines, pol› yaromatics, polyheteroaromatics, poly(aromatic vinylene)s  and poly(heteroaromatic vinylene )s, have raised great  research interests in both industrial and academic commu› nities, because of their great application potentials and their  novel electronic, optical, electrooptical, and opto-electronic  properties. Conducting polymers have been demonstrated to  have great potentials for many important applications, such  as antistatic, ESD, EMI-shielding, cable-shielding, radar› shielding, high frequency capacitor, rechargeable battery,  anti-corrosion, gas separation membranes, smart window,  chemical sensor, bio-sensor, solar cell, light-emitting diode,  electrochromic display,  field effect transistor,  organic  memory device, lithography, via-hole electroplating, and  nonlinear optical materials.  Up to now, there is only one reported prior method of  preparing polythiophene from 2-bromothiophenes (U.S. Pat.  No. 6,602,974). For example, McCullough indicated that the  above regioregular poly(3-substituted thiophenes) can also  be made from 3-substituted 2-bromo-thiophene via a three- step reaction by treating the monomer in the first step with  a strong base LDA (lithium diisopropylamine, prepared  freshly from the reaction of diisopropylamine with n-butyl  lithium) under cryogenic temperatures at -40°  C. for 40  minutes, followed by the addition of MgBr$_{2 }$ at -60°  C. for  about 1 hour in the second step, and then by the addition of  Ni(II)-complex at -5°  C. in the third step, and finally  allowed the reaction to proceed at room temperature for  additional 18 hours.  All the above mentioned prior methods have encountered  the disadvantage of being contaminated with substantial  amount of transitional metal impurities that can cause det› rimental effects to the optimal performance, long term  stability, and the lifetime of their application articles and  devices. Furthermore, most of the conventional methods  involve use of either a strong base (such as organolithium  reagent, organomagnesium reagent, and LDA) or a reactive  metal (such as activated Zn metal, Mg metal, and Li metal),  or in some cases the use of both reagents. These reagents are  reactive toward the monomers that contain a proton group  having a  pKa  value of less than about 40 (such as S-H,  O-H, N-H, acetylenic proton, a-hydrogen to a carbonyl  group or to other electron-withdrawing group, and all the  C-H groups except those of alkyl, alkoxy, phenyl, and  vinyl) and also reactive toward electrophilic functional  groups (such as carbonyl, carbonate, nitrile, imino, nitro,  nitroso, sulfoxide, sulfinyl, and sulfonyl, phosphonyl, phos- phinyl, epoxy, alkyl halide, and other similar groups).  Such reactivity will cause great limitations on the allow› able functional groups appearing on the thiophene mono› mers. Similar limitations would also occur to the conven› tional chemical oxidative polymerization method, wherein  the employed strong oxidant causes the undesirable oxida-